Sunday
May 29, 2016

Homework Help: Science: Physics

Recent Homework Questions About Physics

physics
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 11, 2016 by paresh

physics
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 11, 2016 by paresh

physics
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 11, 2016 by paresh

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 11, 2016 by paresh

Physics
How much steam at 100 degree centigrade will just melt 3200g of rice at -10 degree centigrade ? ( S.H.C of rice = 0.5 cal/g digree centigrade; Let heat of vapour of steam =540cal/gg).
Thursday, February 11, 2016 by paresh

Physics
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 11, 2016 by paresh

Physics
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 11, 2016 by paresh

Physics
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 11, 2016 by paresh

physics
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 11, 2016 by paresh

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 11, 2016 by paresh

Physics
Suppose the height of the ramp is h1= 0.3 m, and the foot of the ramp is horizontal, and is h2= 1.00 m above the floor. What will be the horizontal distance traveled by the following four objects before they hit the floor? Assume that R= 12.7 mm in each case; assume that the ...
Thursday, February 11, 2016 by Anonymous

physics
A car approaching a bend in a road has its speed decreased from 30m/s to 10m/s.while traversing. A distance of 30m Calculate. 1- What's de retardation 2- How long did it take to traverse this distance
Thursday, February 11, 2016 by okeke

Physics
The displacement of a block of mass 439g 439 g attached to a spring whose spring constant is 66N/m 66 N m is given by x=Asin(ωt) x A s i n ω t where A=12cm A 12 c m . In the first complete cycle find the values of x x and t t at which the kinetic energy is equal to ...
Wednesday, February 10, 2016 by Sarah

physics
A missile is fired at an initial velocity of 1500m/s. What should be the angle to reach a maximum horizontal target? (Show proof) I need your help.
Wednesday, February 10, 2016 by ralph steeve

physics
A 82 kg runner with a speed of 5.6 m/s makes a sharp turn with a radius of 1.1 m to avoid a collision. What is the magnitude of the frictional force (in N) the ground exerts on the runner during the turn?
Wednesday, February 10, 2016 by tony

Physics
A 0.75-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.6 m on a frictionless horizontal surface.
Wednesday, February 10, 2016 by 6 GOD

physics
A spring is stretched by 8 cm when a force of 2 N is applied. If a force of 5.8 N is applied, how many additional cm does the spring stretch? would it be 8/2 =4*5.8= 23.2
Wednesday, February 10, 2016 by tony

physics
a macopolo of a mass 1200000g travelling at 72km/h is brought to rest in 4s.with the aid of a diagram,find its (a)average retardation (b)average breaking distance (c)the total distance moved during deceleration
Wednesday, February 10, 2016 by mukosha

Physics Grade 10
The speed limit near a school is 30km/h but Joe Cool thinks he can ignore it. He is driving at 60km/h. To make matters worse, he is talking on his cell phone. Suddenly a child rides his bicycle out of school grounds and across the road on the pedestrian crossing. The maximum ...
Wednesday, February 10, 2016 by Sarah

physics
Given that A= 4.00i(hat)+ 10.0j(hat)and B = 3i(hat)-5.00j(hat), find the magnitude and directions(i.e., angle with respect to the +x axis) of C= A+B magnitude = 8.6 I cant find out how to find the angle
Wednesday, February 10, 2016 by hannah

Physics
Josie and Charlotte push a 14-kg bag of playground sand for a sandbox on a frictionless, horizontal, wet polyvinyl surface with a constant, horizontal force for a distance of 8 m, starting from rest. If the final speed of the sand bag is 0.15 m/s, what is the magnitude of the ...
Wednesday, February 10, 2016 by Melanie

General physics
A 4.6 kg object is subjected to two forces, F~1 = (2.8 N)iˆ+(−3.5 N)jˆ and F~2 = (4 N)iˆ+(−11.5 N)jˆ. The object is at rest at the origin at time t = 0.What is the magnitude of the objects acceleration? -i've tried using the equation ...
Wednesday, February 10, 2016 by David

physics
In designing access ramp for a shopping mall , it is desided that maximum force required by someone pushing a person in a wheelchair of total mass 90kg should be 80newter .calculate maximum angle for ramp
Wednesday, February 10, 2016 by Anonymous

College Physics
A truck moving north at a speed of 70 km/h. The exhaust pipe on top sends out a trail of smoke that makes a 20 degree angle east of south. If the wind is blowing toward the east. What is the wind speed at that location?
Wednesday, February 10, 2016 by Tim

Physics
An airplane flies 400 km west from city A to city B, then 200km northwest to city c and finally 100 km north to city D. How far it is from city a to d?
Wednesday, February 10, 2016 by Shan Mar

University physics
"Consider a long charged straight wire that lies fixed and a particle of charge +2e and mass 6.70×10-27 kg. When the particle is at a distance 1.61 cm from the wire it has a speed 2.70×105 m/s, going away from the wire. When it is at a new distance of 2.71 cm...
Wednesday, February 10, 2016 by Ed

University physics
"A droplet of oil carries an extra charge of one electron and is held motionless between parallel plates separated by 1.80 cm across which there is a potential difference of 55.5 kV. What is the mass of the droplet?" I assumed that this whole thing was actually a ...
Wednesday, February 10, 2016 by Ed

Physics
It takes 170 kJ of work to accelerate a car from 21.5 m/s to 27.0 m/s. What is the car's mass?
Tuesday, February 9, 2016 by Melanie

Physics
What is the maximum distance we can shoot a dart, from ground level, provided our toy dart gun gives a maximum initial velocity of 2.54 m/s and air resistance is negligible? I know the answer is 0.658m but i don't get how to do this problem.
Tuesday, February 9, 2016 by Anonymous

physics
A boulder flies through the air at 14.5 m/s with kinetic energy 310 J. What's its mass? What's the boulder's kinetic energy if its speed doubles? What's the boulder's kinetic energy if its speed is halved?
Tuesday, February 9, 2016 by leon

physics
A bus is traveling 30 m/s and travels 20m. How far does it travel froom each point?
Tuesday, February 9, 2016 by Shauni

physics
A horizontal spring with k = 110 N/m has one end attached to the wall. A 290 g block is pushed onto the free end, compressing the spring by 0.160 m . The block is then released, and the spring launches it outward. Neglecting friction, what's its speed when it leaves the ...
Tuesday, February 9, 2016 by holly

Physics
(Someone please help me !! I don't understand this.) Two tiny conducting spheres are identical and carry charges of -27.3C and +61.0C. They are separated by a distance of 2.64 cm. (a) What is the magnitude of the force that each sphere experiences? (b) The spheres are ...
Tuesday, February 9, 2016 by Matthew

physics
A 71.0 kg patient is suspended in a raised hospital bed as shown in the figure. The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the patient and the bed are 0.500 and 0.800, ...
Tuesday, February 9, 2016 by andrew

Physics
Two point charges, 3.0 µC and -2.0 µC, are placed 4.8 cm apart on the x axis, such that the -2.0 µC charge is at x = 0 and the 3.0 µC charge is at x = 4.8 cm. At what point(s) along the x axis is the potential zero? I know that between the two charges, ...
Tuesday, February 9, 2016 by Anonymous

physics
A boat’s speed in still water is 1.80 m/s . The boat is to travel directly across a river whose current has speed 1.20 m/s . Determine the speed of the boat with respect to the shore.
Tuesday, February 9, 2016 by JerkyBerky

physics
A child ties a rock to a string and whirls it around in a horizontal circle. Assuming a 1.50 m -long string making 20.0 ∘ angle below the horizontal, find the speed of the rock. Find the period of its uniform circular motion.
Tuesday, February 9, 2016 by missy

Physics
Hello can someone please help me with this physics question and show the work so I can understand? A box at the top of a rough incline possesses 981 joules more gravitational potential energy than it does at the bottom. As the box slides to the bottom of the incline, 245 ...
Tuesday, February 9, 2016 by Becky

physics
An electric field of magnitude 3640 N/C is applied along the x axis. Calculate the electric flux through a rectangular plane 0.166 m wide and 0.72 m long if the plane is parallel to the yz plane. Answer in units of N · m2 /C. 435.05 N. m2/C 002 (part 2 of 3) 10.0 points...
Tuesday, February 9, 2016 by sami

physics
An airplane has a speed 590 km/h . If a wind begins blowing from the southwest at a speed of 94.9 km/h (average). In what direction should the pilot aim the plane so that it will fly due south?
Tuesday, February 9, 2016 by JerkyBerky

Physics
This seems like a really dumb question to ask, but when I'm told that the charge on an atom (say for example, a fluorine atom) is +0.422e, does the e after the numerical value means 0.422 times the charge of an electron, 1.6 x 10-19, or is e a unit of charge? Thanks.
Tuesday, February 9, 2016 by NoNameAnon

Physics
A uniformed lath AB of length 80 cm and mass of 50g is pivoted at a point p,25 cm from one end it is kept horizontal by support at the other end by a vertical string. Calculate the tension in the string.
Tuesday, February 9, 2016 by Anthony

Physics Help!!!
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
Tuesday, February 9, 2016 by tom

physics
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
Tuesday, February 9, 2016 by tom

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
Tuesday, February 9, 2016 by tom

physics
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
Tuesday, February 9, 2016 by Kristina

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
Tuesday, February 9, 2016 by Kristina

Physics
A block of weight 30.9 N is hanging from a rope. The tension from the rope is pulling upward on the block. The block is accelerating downward at a rate of 1.20 m/s2. What is the magnitude of the tension in the rope? I found the mass of the block to be 25.75 kg; however, I'...
Tuesday, February 9, 2016 by Emily

Physics
A block of weight 30.9 N is hanging from a rope. The tension from the rope is pulling upward on the block. The block is accelerating downward at a rate of 1.20 m/s2. What is the magnitude of the tension in the rope?
Tuesday, February 9, 2016 by Emily

Physics
Lead spheres of masses 1.7 kg and 20.4 g whose centers are separated by 6.1 cm. Calculate the gravitational force between these spheres, treating each as a point mass located at the center of the sphere. The value of the universal gravitational constant is 6.67259 × 10...
Tuesday, February 9, 2016 by George

Physics
A bug is on the rim of a 78 rev/min, 12 in. diameter record. The record moves from rest to its final angular speed in 3.29 s. Find the bug’s centripetal acceleration 1.5 s after the bug starts from rest. (1 in = 2.54 cm). Answer in units of m/s^2 .
Tuesday, February 9, 2016 by John

Physics
Review problem. A block of mass m = 2.00 kg is released from rest at h = 0.500 m above the surface of a table, at the top of a theta = 30.0 incline as shown in Figure 3. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration of the ...
Tuesday, February 9, 2016 by Edge

Physics
An ideal gas whose adiabatic exponent
Tuesday, February 9, 2016 by Anushka

physics help
A homogeneous disk of mass m and of radius r free to rotate without friction about its horizontal axis, is used used as a pulley. An extensible string of negligible mass is wound around this pulley and a mass M is connected to its free end. When the system is released the ...
Tuesday, February 9, 2016 by Cynthia

Physics
The Young's modulus of the material of a wire is 6 x 10^12 N/m2 and there is no transverse strain. The modulus of rigidity is
Tuesday, February 9, 2016 by Anushka

physics
what is the electric flux through a sphere that has a radius of 2.2m and carries charge of 5.3 micro couloumb at its centre? solution
Tuesday, February 9, 2016 by Temitope

Physics
Suppose that 4.7 moles of a monatomic ideal gas (atomic mass = 8.5 × 10^-27 kg) are heated from 300K to 500K at a constant volume of 0.47 m^3. It may help you to recall that CVCV = 12.47 J/K/mole and CPCP = 20.79 J/K/mole for a monatomic ideal gas, and that the number of...
Tuesday, February 9, 2016 by Billy

Physics
A tank holds 135 moles of argon gas (atomic mass = 6.633521 × 10^-26 kg) at a pressure of 101300 Pa and a temperature of 302K. Recall that the number of gas molecules is equal to Avagadros number (6.022 × 10^23) times the number of moles of the gas 1) What is the ...
Tuesday, February 9, 2016 by Billy

Physics
A cylinder with a movable piston contains 14 moles of a monatomic ideal gas at a pressure of 2.26 × 105 Pa. The gas is initially at a temperature of 300 K. An electric heater adds 52600 J of energy into the gas while the piston moves in such a way that the pressure ...
Tuesday, February 9, 2016 by Billy

Physics
A tank with a constant volume of 3.44 m3 contains 14 moles of a monatomic ideal gas. The gas is initially at a temperature of 300 K. An electric heater is used to transfer 52600 J of energy into the gas. It may help you to recall that CVCV = 12.47 J/K/mole for a monatomic ...
Tuesday, February 9, 2016 by Leul

Physics
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate. The crate slides down a long ramp that is inclined at an angle of 40 ∘ above the horizontal. The crate has mass 162 kg . You are sitting inside the crate (...
Tuesday, February 9, 2016 by Denny

physics
A 10.7 g mass is attached to a horizontal spring with a spring constant of 12.6 N/m and released from rest with an amplitude of 37.8 cm. What is the speed of the mass when it is halfway to the equilibrium position if the surface is frictionless?
Tuesday, February 9, 2016 by sydney

Physics
x = 2t^3 - 21t^2 + 60t - 30 is the motion of an ant where x is his location on the number line at time t seconds. 1) When is he going to the left? Answer: between 3 to 5 seconds 2) When is he going to the right? Answer: between 0 to 2 seconds 3) What is his net displacement ...
Tuesday, February 9, 2016 by Udi

Physics
A plate made of steel has a 18.9979 mm diameter hole cut into it. A 19.0000 mm diameter ball made of glass is sitting in the hole. Both are at an initial temperature of 9.00 deg. C. If the plate and ball are both heated, at what temperature will the ball just fit through the ...
Monday, February 8, 2016 by Brooke

physics
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
Monday, February 8, 2016 by tamara

Physics mechanics
Two identical 17.7-kg balls, each 23.9 cm in diameter, are suspended by two 35.0-cm wires as shown in the figure (Figure 1) . The entire apparatus is supported by a single 18.0-cm wire, and the surfaces of the balls are perfectly smooth. what is the tension in the top wire?
Monday, February 8, 2016 by joshua

Physics
I have a few physics questions that I don't understand. Two are thermal expansion problems and the other is an ideal gas law problem. 1. Two rods, one made of iron and the other of aluminum, have the same initial length at 64.00 deg. C? When the temperature drops to 4.00 ...
Monday, February 8, 2016 by Alyssa

Physics
Calculate the speed with which a swimmer enters water if she slides down a frictionless ramp that is 2.6 m high
Monday, February 8, 2016 by Tony

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
Monday, February 8, 2016 by tom

physics
A game of tennis... A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the ...
Monday, February 8, 2016 by tom

physics
A ball is thrown vertically upward with an initial speed of 25 m/s. Then, 1.8 s later, a stone is thrown straight up (from the same initial height as the ball) with an initial speed of 32.1 m/s . How far above the release point will the ball and stone pass each other? The ...
Monday, February 8, 2016 by Mariana

Physics
Two students are on a balcony 22 m above the street. One student throws a ball vertically downward at 15.5 m/s; at the same instant, the other student throws a ball vertically up- ward at the same speed. The second ball just misses the balcony on the way down. How far apart ...
Monday, February 8, 2016 by Mariana

physics
A chair of mass 14.5 kg is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force F = 35.0 N that is directed at an angle of 43.0 ∘ below the horizontal and the chair slides along the floor. find the normal force of chair on floor
Monday, February 8, 2016 by pop

Physics
Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 2 L, the pressure is 1065 kPa (kilopascals). What is the pressure when the volume is 15 L?
Monday, February 8, 2016 by Marie

physics
Canadian snowbirds usually follow the I-15 at a speed of about 120 kilometers per hour. Canadian geese, on the other hand, migrate approximately along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 kilometers per ...
Monday, February 8, 2016 by tom

physics
A tennis ball is served 2.00 degrees above the horizontal at a height of 2.40 meters, 12.0 meters from a net that is 0.900 meters high. (a) If the tennis ball is to clear the net by at least 0.200 meters, what is its minimum initial velocity? (b) If the tennis ball clears the ...
Monday, February 8, 2016 by tom

physics
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 degrees above the horizontal, some of the tiny critters have reached a maximum height of 58.7 cm above the level ground. (See Nature, Vol. 424, 31 July 2003, p. 509...
Monday, February 8, 2016 by tom

physics
a car moving at 10ms - was uniformly accelerated for 5s until it velocity reaches 20ms -. it then maintain the speed for another 20s after which the brakes were applied as the vehicle was finally brought to rest in a further 10s.draw the velocity time graph of the motion
Monday, February 8, 2016 by queenlatifah

physics
An object with a mass of 2kg is moving at 8m.s-1 a net force acts on iy for 7s,after which it moves at 10m.s-1 in the opposite direction. The magnitude and direction of the net force is
Monday, February 8, 2016 by lindokuhle mahlamvu

physics
A rocket blasts off from rest and attains a speed of 49 m/s in 16 s. An astronaut has a mass of 56.3 kg. What is the astronaut's apparent weight during take off?
Monday, February 8, 2016 by Bill

Physics
A rocket of mass 4.5 105 kg is in flight. Its thrust is directed at an angle of 47.5° above the horizontal and has a magnitude of 6.60 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizontal.
Monday, February 8, 2016 by Kylie

physics
a pitcher threw a baseball clocked at 105 miles per hour. The pitcher’s mound is 60 feet 6 inches from home plate. How long did it take, in seconds, for the ball to travel from the pitcher’s mound to home plate?
Monday, February 8, 2016 by Lakisha

physics
the speed of a bus increase uniform from 15mls 6mls in 20s calculate.a the average speed.b accelaration. c the distance travelled during the either period
Monday, February 8, 2016 by shafiu

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? 114.33 N/m (b) What is the time for one complete bounce of this child...
Monday, February 8, 2016 by Jesse

Physics
A penguin has a mass of 13 kg. The penguin slides over the ice for a distance of 50.7 m in 1.7 s before coming to a complete stop. The penguin uniformly accelerates during the entire time period. What is the net force exerted on the penguin?
Monday, February 8, 2016 by CJ

Physics
A bug rides on a turntable which is rotating at 3 rad/s. The moto is turned off, and the bug covers 36 radians before coming to rest. a. What is the angular acceleration of the bug? b. How long does it take the bug to stop?
Monday, February 8, 2016 by John

Maths.physics.chemestry.english
6x+1/2a -x-2/2a
Monday, February 8, 2016 by Ibrahim

Physics
A stone is thrown vertically upward at an initial speed of 10m/s. Find the total time of the flight and the maximum height reached by the stone.
Monday, February 8, 2016 by Jane

Physics
A tennis player throws a tennis ball vertically up with an initial velocity of 50m/s. Another player catches the ball after 0.43s. Find the time upward, time downward, and the vertical distance upward.
Monday, February 8, 2016 by Jane

Physics
A 4.40g bullet moving with an initial speed of vi = 405 m/s is fired into and passes through a 1.20 kg block. The block, initially at rest on a frictionless horizontal surface, is connected to a spring with a spring constant of 880 N/m. If the block moves x = 4.37 cm to the ...
Sunday, February 7, 2016 by Anonymous

Physics
A 69.6 kg fire fighter slides down a pole while a constant frictional force of 263 N retards his motion. A horizontal 18.7 kg platform is supported by a spring at the bottom of the pole to cushion the fall. The fire fighter starts from rest 5.80 m above the platform, and the ...
Sunday, February 7, 2016 by Anonymous

Physics
A rocket is fired at an angle from the top of a tower of height h0 = 68.6 m . Because of the design of the engines, its position coordinates are of the form x(t)=A+Bt2 and y(t)=C+Dt3, where A, B, C , and D are constants. Furthermore, the acceleration of the rocket 1.10 s after...
Sunday, February 7, 2016 by Antonio

physics
A ski jumper leaves a slope at an angle of 20.0 degrees above the horizontal direction. She lands 3.50 seconds later at a point 20.0 meters below her take-off point. (a) What was her initial speed? (b) How far does she travel horizontally?
Sunday, February 7, 2016 by tom

Physics
The mass of a minibus with the driver is 1.50×10^3 kg.Assume that the passengers have an average mass of 50.0kg each.The driver is moving at a speed of 30.0m.s^-1 when he notices that the traffic lights ahead have turned to red.He applies a force of 9000N on the brake ...
Sunday, February 7, 2016 by Hasidiah

physics
A motor car of mass 800kg travelling at 20m/s is brought to rest by brake in 100m.calculate the average braking force required.in physics
Sunday, February 7, 2016 by emma

physics
A stone is dropped from edge of a roof and is observed to pass a window, vertically below it. The stone takes 0.1 sec to fall between the top and bottom of the window. If the window is of 2 m height, how far is the roof above the top of the window?
Sunday, February 7, 2016 by S kumar

physics
i'm trying to calculate the tension in each rope.a body of mass 10 kilogram is kept in equilibrium by 2 ropes.1 rope pulls the body in a horizontal direction and the other in a direction 40 degrees to the vertical.
Sunday, February 7, 2016 by modupe

Physics
A glider with mass m=0.200kg sits on a frictionless horizontal air track, connected to a spring with force constant k=5.00N/m. The glider is released from rest with the spring stretched 0.100 m. What is the displacement x of the glider from its equilibrium position when its ...
Sunday, February 7, 2016 by Anonymous

physics
When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 916 N and the drag force has a magnitude of 1050 N. The mass of the sky ...
Sunday, February 7, 2016 by John

physics
A stone propelled from a catapult with a speed of 59meter per seconds attain a height of 100 meter calculate a. the time of flight b. the angle of the projection c. the range attain
Sunday, February 7, 2016 by Eunice

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