Sunday
February 14, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

Physics
A child bounces in a harness suspended from a door frame by three elastic bands. (a) If each elastic band stretches 0.210 m while supporting a 7.35-kg child, what is the force constant for each elastic band? (b) What is the time for one complete bounce of this child? (c) What ...
Friday, February 5, 2016 by Bust Nuttington

physics
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.50 m/s at an angle of 18.0° below the horizontal. It strikes the ground 5.00 s later. (a) How far horizontally from the base of the building does the ball strike the ...
Friday, February 5, 2016 by kim

physics
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 22.0 m/s. The cliff is h = 38.0 m above a flat horizontal beach, as shown in the figure below. How long after being released does the stone strike the beach below the cliff? s...
Friday, February 5, 2016 by lina

physics
A figure skater glides along a circular path of radius 4.70 m. (a) If she coasts around one fourth of the circle, find the magnitude of the displacement vector. m (b) If she coasts around one fourth of the circle, find what distance she skated. m (c) What is the magnitude of ...
Friday, February 5, 2016 by lina

Physics
Suppose at one point along the Nile River a ferryboat must travel straight across a 1.29-mile stretch from west to east. At this location, the river flows from south to north with a speed of 2.58 m/s. The ferryboat has a motor that can move the boat forward at a constant speed...
Thursday, February 4, 2016 by Courtney

Physics
Roxanne is making a strawberry milkshake in her blender. A tiny, 0.005-kg strawberry is rapidly spun around the inside of the container with a speed of 14.0 m/s, held by a centripetal force of 10.0 Newtons. What is the radius of the blender at this location?
Thursday, February 4, 2016 by Alex

Physics
What is the force of attraction between you and your friend steve if you are 55 kg,the mass of steve is 60 kg, and you are sitting 2.4 meters apart?
Thursday, February 4, 2016 by Alexandre

physics
Two rings of radius 3 cm are 23 cm apart and concentric with a common horizontal x-axis. What is the magnitude of the electric field midway between the rings if both rings carry a charge of +35 nC?
Thursday, February 4, 2016 by Ali

Physics
A river flows due east at 1.54 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 11.2 m/s due north relative to the water. What is the velocity of the boat relative to shore?
Thursday, February 4, 2016 by Carrie

Physics
A digital voltmeter with high internal resistance gives a maximum reading of 2.0 V. It is used to determine current by measuring the potential difference across a standard resistor S through which current has passed. What should the resistance of S be to measure currents up to...
Thursday, February 4, 2016 by Priya

Physics
A high voltage unit has an internal resistance of 50 mega ohms. On open circuit, the potential difference across its output is 3000 V. When a resistor R is connected across its output, the potential difference at the output falls to 1000 V. Calculate the resistance of R.
Thursday, February 4, 2016 by Priya

Physics help
1. The fundamental force that: (4 marks) ____ 1. causes hair to stand on end after being rubbed by a balloon a) strong nuclear ____ 2. causes protons to remain in the nucleus despite repulsive forces b) weak nuclear ____ 3. controls the planets' orbit around the sun c) ...
Thursday, February 4, 2016 by Matt Damon

Physics (Electricity)
A meter has a resistance of 75 ohms and gives full-scale deflection when it passes a current of 1.0 mA. How would you adapt the meter to read a) Currents up to 1A b) voltages up to: 5V c) Voltages up to: 100V
Thursday, February 4, 2016 by Priya

Physics
A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 12.8 m/s at an angle of 65.7° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its vertical speed ...
Thursday, February 4, 2016 by Sam

Physics
A supertanker (mass = 1.90E+8 kg) is moving with a constant velocity. Its engines generate a forward thrust of 7.34E+5 N. Determine the magnitude of the resistive force exerted on the tanker by the water.
Thursday, February 4, 2016 by Emily

Physics
A 1550 kg car is traveling with a speed of 12.4 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.3 m? I found the force of the car to be 14700 by using F=ma. I am confused on what to do with the rest of the ...
Thursday, February 4, 2016 by Emily

Physics
Three students converge on the last textbook in the store. All three grab it and begin to pull in the directions shown in the above figure. Student A exerts a force of 77.64 N, student B pulls with a force of 18.52 N, and student C pulls with a force of 66.43 N at an angle &#...
Thursday, February 4, 2016 by Emily

Physics
A 2kg mass, m1 and a 10 kg mass, m2 are in contact on a horizontal frictionless surface. a constant horizontal force 13.7 N in the positive X direction is applied to m1 and a constant horizontal force 10.7 N in the negative X direction is applied to m2. the masses stay in ...
Thursday, February 4, 2016 by S

Physics
a 61.6 kg person on a diet stand on a bathroom scale in an elevator. to their great pleasure the scale reads 46.8 kg. what is the acceleration of the elevator? (up is positive)
Thursday, February 4, 2016 by S

Physics
A 2 635-kg sailboat experiences an eastward force of 2 710 N by the ocean tide and a wind force against its sails with magnitude of 5 748 N directed toward the northwest (45° N of W). What is the direction of the resultant acceleration?
Thursday, February 4, 2016 by S

Physics
A force vector points at an angle of 50.8° above the +x axis. It has a y component of +282 newtons. Calculate the magnitude of the force vector.
Thursday, February 4, 2016 by Emily

physics
two equal vectors of magnitude 2A are inclime perpendicular to each other find the resultant and direction of vector.
Thursday, February 4, 2016 by john

Physics
A guy riding a buffalo is chasing you at a top speed of 50 km/h, you are well ahead of the rider by 2 km, but your speed is only 20 km/h. How much time do you have to come up with a better plan?
Thursday, February 4, 2016 by sarah

physics
A disk is free to rotate around its fixed axis of revolution (delta). The moment of inertia of disk around delta is J=4×10^-2 kg.m^2 This disk is initially at rest is submitted to the action of a couple whose moment is equal to 0.2 N.m What's the ...
Thursday, February 4, 2016 by vicky

Physics
A rocket is fired at a speed of 76.4 m/s from ground level, at an angle of 61.0° above the horizontal. The rocket is fired toward an 10.6 m high wall, which is located 26.2 m away. By how much does the rocket clear the top of the wall?
Thursday, February 4, 2016 by Emily

physics
A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 2×10^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as positive ). The...
Thursday, February 4, 2016 by angy

physics
a force of 200N is inclined at an angle 120° to another force P. The angle between the 200N force and the resultant force is 50°. Find the magnitude of (a) force P (b) resultant of the two forces
Thursday, February 4, 2016 by haffy

physics
a force of 200N is inclined at an angle 120° to another force P. The angle between the 200N force and the resultant force is 50°. Find the magnitude of (a) force P (b) resultant of the two forces
Thursday, February 4, 2016 by haffy

physics help
A disk is rotating at 50rps (revolution per second) about its fixed axis (delta) with respect to which its moment of inertia is J= 2×10^-2 kg.m^2 A braking couple of moment -0.5N.m is applied to the disk (the sense of rotation of the disk is taken as positive ). The disk...
Thursday, February 4, 2016 by angy

physics help
A disk is free to rotate around its fixed axis of revolution (delta). The moment of inertia of disk around delta is J=4×10^-2 kg.m^2 This disk is initially at rest is submitted to the action of a couple whose moment is equal to 0.2 N.m What's the number of ...
Thursday, February 4, 2016 by angy

Physics
So A rookie quarterback throws a football with an initial upward velocity component of 16.4 m/s and a horizontal velocity component of 19.8 m/s . Ignore air resistance. a) How much time is required for the football to reach the highest point of the trajectory? b) How high is ...
Thursday, February 4, 2016 by Colton Brown

physics
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 16.0 m/s. The cliff is h = 25.0 m above a flat horizontal beach, as shown in the figure below. How long after being released does the stone strike the beach below the cliff? s...
Thursday, February 4, 2016 by joanna

physics help please
A brick is thrown upward from the top of a building at an angle of 35° to the horizontal and with an initial speed of 15 m/s. If the brick is in flight for 2.7 s, how tall is the building? in (m)
Thursday, February 4, 2016 by lisa

physics
A ball is thrown straight upward and returns to the thrower's hand after 2.00 s in the air. A second ball thrown at an angle of 40.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? m/s (b) At what ...
Thursday, February 4, 2016 by lisa

Physics
a crate of weight fg is pushed by a force P on a horizontal floor. (a) the coefficient of static friction is us, and P is directed at angle theta below the horizontal. show that the minimum value of P that will move the crate is given by P=usFgsectheta / 1-ustantheta (b) find ...
Thursday, February 4, 2016 by Sam

PHYSICS%HaLa Me De aNsWeR SHARP! SHARP!! SHARP!!!
A 2kg mass is dropped from a 12m height at what height would the velocity be 5m/s? take g=10m/s square.
Thursday, February 4, 2016 by CHIDIEBERE

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west. a) Determine the magnitude and direction of the resultant force acting on the tree ...
Thursday, February 4, 2016 by Beth

physics
11. If 238U92 emits successively four alpha particles two beta particles, what will be the atomic number and mass number of the final product.
Thursday, February 4, 2016 by paresh Ghosh

physics
10. The velocity of light in a transparent liquid is 1.8X10cm/second, while in vacuum it is 3X10^3cm/second. Find how much the bottom of the vessel containing this liquid appears to be raised if the depth of the liquid is 25cm.
Thursday, February 4, 2016 by paresh Ghosh

physics
9. 2 kg of water is contained in a 2.5 KW electric kittle. Assuring that the heat capacity of the kettle is negligible. Calculate (i) the time taken for the temp of water to rise from 25 degree centigrade to it boiling point 100 degree centigrade. (ii) the mass of the water ...
Thursday, February 4, 2016 by paresh Ghosh

physics
8. What would be the final temperature of the mixture when .5 g of ice at -10 degree are mixed with 250g of water at 30 degree centigrade? S.H.C of ice 0.5cal/g degree centigrade and S.L.H of ice = 80cal/g.
Thursday, February 4, 2016 by paresh Ghosh

physics
7. 50g of steam at 100 degree centigrade is passed into a mixture of 100g of ice and 200gm of water at 0 degree centigrade. Find the rise in temperature. (S.L. H. Of steam = 540 cal/g and Lf of ice = 80cal/g)
Thursday, February 4, 2016 by paresh Ghosh

physics
5. An aluminium cessel of mass 200g, contains 0.5 litre of water. What is the heat required to raise the temperature of the system from 25 Degree centigrade to 75 Degree centigrade? (S.H.C of Aluminium 0.84X10^3J/kg dehree centigrade and S.H.C of water 4.2X10^3J/kg dehree ...
Thursday, February 4, 2016 by paresh Ghosh

physics
4. A bulb is joined to a battery of e.m.f 6V. A steady current of 0.5 A flows through circuit. Calculate the total energy provided by the battery in 5 minutes.
Thursday, February 4, 2016 by paresh Ghosh

physics
3. A house wife uses “a fire tong pair” of length 20cm to lift a piece of burning coal of mass 200gm. If she applies force at a distance of 5cm from the fulcrum, what is her effort? If the efficiency of the fire tong is 100% . find it M.A and V. R.
Thursday, February 4, 2016 by paresh Ghosh

Physics
2. If the wavelength of Deepika’s voice is 2 and that of Ashwaria is 5m respectively in air. Find the frequency of Ashwaria’s voice. Fi the frequency of Deepika’s voice is 750Hz. Which of them has a higher pitch?
Thursday, February 4, 2016 by paresh Ghosh

Physics
1. A man throws a body of mass 500gm with a velocity of 10m/s vertically upward on a planet he weight of the body on the planet.
Thursday, February 4, 2016 by paresh Ghosh

physics
a string is wound a wheel of radius 20cm. how large is the angle through which the wheel must turn to unwind 30cm of the string.
Thursday, February 4, 2016 by muhammad aliyu

physics
a ball of mass 100g is projected vertically upwards from the ground with a velocity of 49m/s at the same time another identical ball is dropped from a height of 98m to fall freely along the same path as followed by the first ball. After some time the two balls collide and ...
Thursday, February 4, 2016 by gudygudy

physics
If 20g of water at 60 degree centigrade is mixed with 60g of water at 20 degree centigrade the resultant temperature is
Thursday, February 4, 2016 by Chanakya

Physics PLEASE PLEASE HELP! CONFUSED
I am so lost and confused right now with this question. I might have a quiz. Help me understand before this pop quiz!!!! THANKYOU A diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0 meters above the water. a) how long before the diver hits the water? ...
Wednesday, February 3, 2016 by Emma

physics
A cubical block of density rB and with sides of length L floats in a liquid of greater density rL. (a) What fraction of the block’s volume is above the surface of the liquid? (b) The liquid is denser than water (density rW) and does not mix with it. If water is poured on ...
Wednesday, February 3, 2016 by mary

Physics
A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 10.1 m/s at an angle of 62.4° above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its vertical speed ...
Wednesday, February 3, 2016 by Emily

physics
In the figure, three connected blocks are pulled to the right on a horizontal frictionless table by a force of magnitude T3 = 89.3 N. If m1 = 14.2 kg, m2 = 23.6 kg, and m3 = 32.3 kg, calculate (a) the magnitude of the system's acceleration, (b) the tension T1, and (c) the...
Wednesday, February 3, 2016 by patrick

Science physics
What is the magnitude of average force a pole vaulters exterts on a landing bag if it's 1.5 meters high and deforms by 0.5 M=60kg Height of the bar=4.5m His centre of mass is 1m
Wednesday, February 3, 2016 by Physics help on problem

True & False explanations Physics
When a projectile is fired at 45 deg. angle and is in free fall, the only point along the path that the acceleration of the object is zero is the instant when the object is at the highest point of its path. Answer: False Can someone explain how? 2.) An object with acceleration...
Wednesday, February 3, 2016 by Emma

physics
What potential difference is required to reduce the initial speed of the proton by a factor of 2? A proton has an initial speed of 3.1×105 m/s .
Wednesday, February 3, 2016 by Natalie

physics
A rocket is fired at a speed of 92.0 m/s from ground level, at an angle of 33.0 ° above the horizontal. The rocket is fired toward an 13.4-m high wall, which is located 26.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its ...
Wednesday, February 3, 2016 by koko

physics
A projectile starts from rest and moves 7 m down a frictionless ramp inclined at 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What will be the range of the projectile if the bottom of the ramp is 1.7 m above the ground? Answer in units of m.
Wednesday, February 3, 2016 by a

physics
A 0.46 kg mass is attached to a spring with a spring constant of 145 N/m so that the mass is allowed to move on a horizontal frictionless surface. The mass is released from rest when the spring is compressed 0.14 m. Find the acceleration of the mass at the instant the spring ...
Wednesday, February 3, 2016 by a

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west. a) Determine the magnitude and direction of the resultant force acting on the tree ...
Wednesday, February 3, 2016 by Beth

physics 2 HELP PLEASE!!
Can someone help break this down.. Please tell me if what I identified is so far correct. Also what equations should I use??? x1= 10m x2=? v1= 1.2 m/s v2=? a= -9.8 m/s^2 t= ? 1.) a diver runs horizontally with a speed of 1.2 m/s off a platform that is 10.0 meters above the ...
Wednesday, February 3, 2016 by Heather

Physics
Two ropes attached to a young tree are pulled by two landscapers. Rope 1 is pulled with 267 N of force at an angle of 23 degrees north of east and Rope 2 is pulled with 377 N of force due west.
Wednesday, February 3, 2016 by Beth

physics
I don't understand. derive a general equation that will predict the horizontal range of a projectile that is fired from one vertical position and ends at any other vertical position with an initial velocity, V1, at an angle, pheta, from the horizontal. The equation should ...
Wednesday, February 3, 2016 by Emma

physics
A positive charge of 0.0001258 C experiences a force of 0.3 N when located at a certain point. What is the electric field magnitude at that point? Answer in units of N/C.
Wednesday, February 3, 2016 by sami

physics
Three point charges, two positive and one negative, each having a magnitude of 30 µC are placed at the vertices of an equilateral triangle (43 cm on a side). What is the magnitude of the electrostatic force on one of the positive charges? The value of the Coulomb ...
Wednesday, February 3, 2016 by sami

Physics
A car goes from 12 m/s to 25 m/s in 6.0 seconds. a.) What is the acceleration of the car? b) How far did it travel in the 6.0 seconds?
Wednesday, February 3, 2016 by Diana

physics
I don't understand. derive a general equation that will predict the horizontal range of a projectile that is fired from one vertical position and ends at any other vertical position with an initial velocity, V1, at an angle, pheta, from the horizontal. The equation should ...
Wednesday, February 3, 2016 by Emily

Physics
A city planner is working on the redesign of a hilly portion of the road. An important consideration is how steep the road can be so that even a low-powered car can get up the hill without slowing down. A particular small car with a mass of 1368 kg can accelerate on a flat ...
Wednesday, February 3, 2016 by Ron

Physics
a car moving at 10 metre per second was uniformly accelerated until it's velocity reaches 20 metre per second.It then maintains this speed for another 20s after which the brakes were applied and the vehicle was finally brought to rest after 10 seconds
Wednesday, February 3, 2016 by Ayomide

Physics
A stunt pilot in an air show performs a loop-the-loop in a vertical circle of radius 3.70 103 m. During this performance the pilot whose weight is 740 N, maintains a constant speed of 2.25 102 m/s. (a) When the pilot is at the highest point of the loop determine his apparent ...
Wednesday, February 3, 2016 by Bust Nuttington

physics
A fireman d = 56.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 24.0° above the horizontal as shown in the figure. If the speed of the stream as it leaves the hose is vi = 40.0 m/s, at what height will the ...
Wednesday, February 3, 2016 by mary

physics
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that height? answer in (m/s)
Wednesday, February 3, 2016 by mary

Physics
A 2.19 kg block is held in equilibrium on an incline of angle q = 55.0o by a horizontal force, F, applied in the direction shown in the figure below. If the coefficient of static friction between block and incline is ms = 0.283, determine the minimum value of F. Determine the ...
Wednesday, February 3, 2016 by Weeks

physics
An aeroplane is moving at 200km/h due 60?. The plane experience a wind blowing at 120km/h due 210?. Find the resultant velocity of the plane by resolving the velocities into their components
Wednesday, February 3, 2016 by laban

Physics
Consider a plane with a velocity relative to the air of 195 m/s in a westerly direction. If the wind has a speed relative to the ground of 53 m/s (in an easterly direction), how long does it take for the plane to travel from one city to another that is due west of the first by...
Wednesday, February 3, 2016 by Heather

Physics
Sound from a 55dB horn is measured at a distance. What is the intensity of the sound in W/m2?
Wednesday, February 3, 2016 by Allan

physics
Suppose 3.0 cm of rain at 10°C falls on a rectangular region of dimensions 2.0 km x 3.0 km. How much energy was released when water vapor condensed to form this amount of rain?
Wednesday, February 3, 2016 by jan

physics
0.50 L of water at 16°C is poured into an aluminum ice cube tray of mass 0.250 kg at the same temperature. How much energy must be removed from this system by the refrigerator to turn the water into ice at -8°C?
Wednesday, February 3, 2016 by jan

physics
Ice is added to 0.75 L of water at 20°C to make very cold water at 0°C. If enough 0°C ice is added so that the mixture becomes all liquid, how much liquid is in the pitcher when this occurs? Density of water = 1.00 x 103 kg/m3.
Wednesday, February 3, 2016 by jan

physics
A stone is projected vertically upward with a speed of 20 m/s. a. What is its velocity at the end of 2s? b. What is the height reacted after 2s?
Wednesday, February 3, 2016 by Lara

physics
Two trucks A and B each travelling at 40 km/hr, move towards each other . At the instance when the two trucks are at a distance 50 km from one another, a car moving at 60 km/hr overtakes A. How far behind the car is A at the point when the car meets B?
Wednesday, February 3, 2016 by jay

Physics (Torque)
Your hand holds a litter of milk while your arm is bent at the elbow in a 90 degree angle. Estimate the torque caused by the milk on your arm about the elbow joint. Indicate all numbers used in your calculations.
Tuesday, February 2, 2016 by Matt

Physics
A bat moving at 5 meters per second is chasing a flying insect, if the bat emits a 40 khz chirp and receives back an echo at 40.4 khz what is the speed of the insect and will the bat be able to catch the insect?
Tuesday, February 2, 2016 by Chris

physics
Find the distance between the two electrons. The value of the Coulomb constant is 8.98755 × 109 N · m2 /C 2 and the acceleration of gravity is 9.81 m/s 2 . 1. 0.507424 m 2. 50.7424 m 3. 5.07424 km 4. 5.07424 m 5. 5.07424 cm can anybody help me please
Tuesday, February 2, 2016 by sami

Physics
A block of weight 41.8 N is hanging from a rope. The tension in the rope is 24.4 N, pulling upward on the block. What is the magnitude and direction of the acceleration of the block? I know the direction would be downwards, since the tension of the rope is less than the weight...
Tuesday, February 2, 2016 by Emily

ap physics
a rope is strung between two cliffs. A mountain climber weighing 100 kg is halfway across the rope when the rope forms an angle of 45 degrees with the horizontal. The tension in the rope is closest to what value?
Tuesday, February 2, 2016 by Kathleen

physics
why , regardless of the magnitude of the initial velocity, the maximum horizontal displacement for a projectile occurs when the angle is 45 degrees. Specifically, what happens when the angle is increased or decreased. How would you mention vector components and also ...
Tuesday, February 2, 2016 by Madi

physics
The membrane that surrounds a certain type of living cell has a surface area of 4.50 × 10-9 m2 and a thickness of 1.00 × 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.3. The potential on the outer ...
Tuesday, February 2, 2016 by jared

Physics
This is another question I had too and didn't understand as well. Vector Addition: Use the head to tail method to determine the resultant vector of the following velocity vectors. V1= 540m/s @66 degrees V2= 12m/s @182 degrees V3= 96m/s @312 degrees V4= 332m/s @261 degrees
Tuesday, February 2, 2016 by Dina

Physics
Vector Addition: I know you can't physically do drawings on this site. Is there a way of someone explaining how to begin with this problem. Can I chose any scale. The directions said to use the head to tail method to determine the resultant vector of the following velocity...
Tuesday, February 2, 2016 by Dina

Physics
A block of mass 4.11 kg is hanging from a rope. The tension in the rope is 23.5 N, pulling upward on the block. What is the magnitude and direction of the acceleration of the block? F=ma 23.5=4.11a The result was 5.72 and was not correct. Please help!
Tuesday, February 2, 2016 by Emily

Physics
A hollow sphere has a uniform volume charge density of 2.22 nC/m3. The inner radius is a = 12.2 cm and the outer radius is b = 24.4 cm. What is the magnitude of the electric field at 18.3 cm from the center of the sphere? What is the magnitude of the electric field at 78.1 cm ...
Tuesday, February 2, 2016 by Michael

Ap Physics
Ball A,with a mass of 1.75kg,moves with a velocity of 3.50 m/s. It collides with a stationary ball B, with a mass of 2.50kg. After the collision, ball A moves in a direction of 55° to the left of its original direction, while ball B moves in a direction 35° to the ...
Tuesday, February 2, 2016 by Shelton

PHYSICS:
find the maximum velocity of a swingling pendulum bob.Hint potential energy(P.E)=kinetic energy(K.E)
Tuesday, February 2, 2016 by CHIDIEBERE

physics
a block of mass m is placed on a smooth turntable at a distance of 20cm from the centre.a string is tied to the block and its other end passed through a gole in the centre of the table.A 2nd block of mass m is suspended from the free end of the string as shown in fig.At what ...
Tuesday, February 2, 2016 by Rutvik

Physics
A metal ball of mass 2kg is allowed to fall freely from rest from height of 5m. Calculate potential energy it possesses and kinetic energy before it reaches the ground. What happens to mechanical energy of the ball after it hits the ground?
Tuesday, February 2, 2016 by Angela

Physics
A Boeing 747 has a mass of 400,000kg and a takeoff speed of 100m/s . It cruises at a height of 10,000m at a speed of 255m/s
Tuesday, February 2, 2016 by Darth vader

physics
1. A 50.0 Lb box is to be moved along a rough floor at a constant velocity. The coefficient of the kinetic friction is 0.300. A. What force must you exert if you push downward on the box? B. What force must you exert if you pull upward on the box? C. Which is the better way to...
Tuesday, February 2, 2016 by Anonymous

physics
A ball is thrown vertically upword with an initial velocity of 40m/s (1) calculate 1 it velocity after 3secs (2) the maximum height attend and the time taken to reach the maximum height (3) the total taken for the ball to return to the grand again
Tuesday, February 2, 2016 by TLIMAN

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