# Physics

physics
A man is walking due east at the rate of of 4kmph and the rain is falling 30° east of vertical with a velocity of 6kmph the velocity of rain relative to the man will be

Physics
Tucker, from a 20 m tower, throws a ball horizontally that travels a distance of 60 m. At what speed, in m/s, is the ball thrown?

physics
A boy in a wheelchair (total mass, 46.9kg) wins a race with a skateboarder. He has a speed of 1.30m/s at the crest of a slope 2.35m high and 12.6m long. At the bottom of the slope, his speed is 6.28m/s. If air resistance and rolling resistance can be modeled as a constant ...

physics
High-speed stroboscopic photographs show that the head of a golf club of mass 230g is traveling at 56.1m/s just before it strikes a 44.6g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.4m/s. Calculate the speed of the golf ...

physics
A physics professor is going ice skating for the first time. She has gotten herself into the middle of an ice rink and cannot figure out how to make the skates work. Every motion she makes simply cause her feet to slip on the ice and leaves her in the same place she started. ...

physics
High-speed stroboscopic photographs show that the head of a golf club of mass 230g is traveling at 56.1m/s just before it strikes a 44.6g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.4m/s. Calculate the speed of the golf ...

physics
High-speed stroboscopic photographs show that the head of a golf club of mass 230g is traveling at 56.1m/s just before it strikes a 44.6g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.4m/s. Calculate the speed of the golf ...

physics
A car is stopped for a traffic signal. When the light turns green, the car accelerates, increasing its speed from zero to 5.47m/s in 0.919s. What linear impulse does a 74.1kg passenger in the car experience?

physics
A boy in a wheelchair (total mass, 46.9kg) wins a race with a skateboarder. He has a speed of 1.30m/s at the crest of a slope 2.35m high and 12.6m long. At the bottom of the slope, his speed is 6.28m/s. If air resistance and rolling resistance can be modeled as a constant ...

Physics
The position of a particle moving along the x axis varies in time according to the expression x=4t^2+2 where x is in meters and t is in seconds. Evaluate it's position at the following times a) Find the displacement from 0s to 3s b) Find the average velocity from 0s to 3s c) ...

Physics
A wire-wound resistor with a resistance of250ohm Will overheat if the power dissipated exceeds 10W.What is the maximum constant voltage V that can be applied across the terminals of this resistor?

Physics
A train slows down as it rounds a sharp horizontal turn, going from 90 km/h to 54 km/h in the 15.0 it takes to round the bend. Compute the acceleration at the moment the train reaches 50.0 km/h. Assume the train continues to slow down at this time in the same rate. I need help...

Physics - Buoyancy
A sphere of mass of m = 1.69 kg is first placed directly on the plate of an electronic scale. The scale shows 16.58 N as the weight of the object. A large beaker containing a liquid with a density of 783 kg/m^3 is then placed on the scale and the scale is tared (i.e. zeroed to...

Math/Physics
Steve (85 kg) is gliding (v ≠ 0) east on his cross-country skiing across a flat section of snow and is experiencing a wind resistance of 2 N against him. The coefficient of kinetic friction between the skis and the snow is 0.09. If the force of friction and wind resistance ...

Physics
An adventurous aardvark arduously ambles from (3.0, 2.0) m to (−4.0, −2.0) m. What is the displacement in polar coordinates?

Physics P
8.31 Wh (watthours) heat is transmitted to 1 mole single atomic ideal gas. The gas temperature is 27Â°C and the pressure is constant during the process (slow process). What is the temperature? What is the change of the internal energy of the gas? What is the work done during...

Physics
A 7.40-kg block is placed on top of a 12.5-kg block that rests on a frictionless table. The coefficient of static friction between the two blocks is 0.610. What is the maximum horizontal force that can be applied before the 7.40-kg block begins to slip relative to the 12....

Physics
8.31 Wh (watthours) heat is transmitted to 1 mole single atomic ideal gas. The gas temperature is 27°C and the pressure is constant during the process (slow process). What is the temperature? What is the change of the internal energy of the gas? What is the work done during ...

Physics
A satellite has a mass of 5823 kg and is in a circular orbit 4.45 × 105 m above the surface of a planet. The period of the orbit is 1.9 hours. The radius of the planet is 4.57 × 106 m. What would be the true weight of the satellite if it were at rest on the planet’s ...

Physics
A 20.0-kg crate sits at rest at the bottom of a 13.5 m -long ramp that is inclined at 40 ∘ above the horizontal. A constant horizontal force of 290 N is applied to the crate to push it up the ramp. While the crate is moving, the ramp exerts a constant frictional force on it ...

Physics
A small glider is placed against a compressed spring at the bottom of an air track that slopes upward at an angle of 38.0 ∘ above the horizontal. The glider has mass 6.00×10−2 kg . The spring has 630 N/m and negligible mass. When the spring is released, the glider travels...

Physics
Mary and her younger brother Alex decide to ride the carousel at the State Fair. Mary sits on one of the horses in the outer section at a distance of 2.0 m from the center. Alex decides to play it safe and chooses to sit in the inner section at a distance of 1.1 m from the ...

Physics
Two satellites S1 and S2 orbit around a planet P in circular orbits of radii r1 = 5.25 106 m, and r2 = 8.60 106 m respectively. If the speed of the first satellite S1 is 1.65 104 m/s, what is the speed of the second satellite S2? m/s

Physics
A - A girl delivering newspapers covers her route by traveling 4 blocks west, 2 blocks north, then 6 blocks east. What is her resultant displacement? Answer in units of blocks. B - What is her direction? Use counterclockwise as the positive angular direction from due east, ...

Physics
Tammy leaves the oﬃce, drives 51 km due north, then turns onto a second highway and continues in a direction of 31◦ north of east for 82 km. What is her total displacement from the oﬃce? Answer in units of km. At what angle is her displacement? (Consider east to be 0◦ ...

Physics
A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 5.5 m to the north, 5.3 m 45◦ north of east, and 8.6 m 13◦ west of south. Starting at the same initial point, an expert (lucky) golfer could make the hole in a single ...

Physics
A - A boy runs 12.7 blocks North, 7.5 blocks Northeast, and 14.4 blocks West. Determine the length of the displacement vector that goes from the starting point to his ﬁnal position. B - Determine the direction of the displacement vector. Use counterclockwise as the positive ...

Physics
A quarterback takes the ball from the line of scrimmage, runs backward for 19.0 yards, then runs sideways parallel to the line of scrimmage for 12.0 yards. At this point, he throws a 43.0-yard forward pass straight down the ﬁeld. What is the magnitude of the football’s ...

Physics
A -A child rides a toboggan down a hill that descends at anangle of21.8◦ to thehorizontal. The hill is 42.6 m long. What is the horizontal component of the child’s displacement? Answer in units of m. B - What is the vertical component of the child’s displacement? Answer ...

Physics
A 20N block rests on a table, connected by a massless rope to a 12N block hanging off the table. Assume the pulley is light and frictionless. What is the tension in the rope? ______________________________________ I calculated the masses to be 2.04kg and 1.22kg respectively. ...

physics
A stone is attached to the end of an elastic string and whirled round in a circle path of radius 80cm if the stone makes 9 complete revolution in 3 seconds .find its angular and linear velocities during this period

physics
A stone is tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 radian per seconds with what tangential velocity will the stone move off the circle if the string cuts

physics
Explain the term uniform acceleration and average speed

Physics
There is gas in a gas container. A valve on the container will be opened and a quarter of the gas quantity will be released to the outer range. Due to this process the temperature of the gas will be decreased by 20%. What is the decrease of the gas pressure?

Physics
What is the average kinetic energy of nitrogen molecule at 20°C

Physics
A light, ideal spring with a spring constant k = 100 N/m and uncompressed length L = 0.30 m is mounted to the fixed end of a frictionless plane inclined at an angle θ = 30.0° as shown above. Then a mass M 0.300 kg is affixed to the end of the spring and allowed to slowly ...

physics
A closed inexpansible vessel contains air saturated with water vapour at 77 degree Celsius.The total pressure in the vessel is 1007mmHg.Calculate the new pressure if the temperature is reduced at 27 degree Celsius (S.V.P of water at 77degree celcius and 27 degree Celsius ...

Physics
(a) A hotdog vendor named Sam is walking from the southwest corner of Central park to the Empire State Building. He starts at the intersection of 59th Street and Eighth Avenue, walks 3 blocks east to 59th Street and Fifth Avenue, and then 25 blocks south to the Empire State ...

Physics
What is the power of engine that pulls a 1000 kg automobile at a steady speed of 10 m/sec along a level road?

Physics :(
A standard dorm bedroom at most colleges is 10 ft. wide by 15 ft. long. A bag of regular M&Ms has approximately 200 candies inside of it and usually costs around 67 cents. How much money would it cost to completely fill a dorm bedroom with regular M&Ms? a) Clearly state how ...

Physics
An anti-hydrogen atom is made using an antiproton and a positron. The spectral lines corresponding to the energy transitions of the positron are then measured. Which of the following statements, if any, are true? A) The measured spectral lines will all be identical to those of...

Physics
A ball is dropped from a height h without air resistance. If the ball falls a distance of h/2 in a time t, how much time is required to fall the remaining h/2? Could you show steps because I don't understand how to work the problem. Thank you.

Physics
What would the slope represent in a torque vs force graph, and what would its units be. I graphed the points and got a slope of .4778, but am not sure what it represents.

Physics, need help now
A car going 15 m/s is brought to rest in a distance of 3 m as it strikes a pile of dirt. How large a force is exerted by the seatbelts on a 90 kg passenger as the car is stopped?

physics
Two forces whose resultant is 100newton are perpendicular to each other if one of them makes an angle of 60Â° with the resultant. calculate its magnitude

physics
A student with mass 50 kg jumps off a high diving board.Using 6.0×1024 kg for the mass of the earth, what is the acceleration of the earth toward her as she accelerates toward the earth with an acceleration of 9.8 m/s2 ? Assume that the net force on the earth is the force of ...

Physics 1
A truck travels up a hill with a 5.7◦ incline. The truck has a constant speed of 22 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s. NEED HELP ASAP! ASSIGNMENT DUE IN 15 MIN

physics
A rifle is aimed horizontally at a target 50m away, the bullet hits the target 0.02m below the aim point what is the bullets flight time?

PHYSICS
Wanda is pushing a stroller and starts from rest, uniformly accelerating at a rate of 0.500 m/s2. What is the velocity of the stroller after it has traveled 4.75m?

Physics
A block with its mass M=200g is released from rest at a height of b=19 cm on a frictionless x=28° incline. It slides down the incline and then along a frictionless surface until it collides elastically with an block whose mass is 800 at rest d=1.5 m from the bottom of the ...

maths,life sciences,physics and geography
Which careers are avaliable for these subjects maths,life orientation,physics and geography

Physics
A car starts from rest and accelerates uniformly at 2m/s2 for 10 sec . Find the velocity and displacement at the end of 10 seconds .

physics
A body of mass 0.500 kg moving at 6.00 m/s strikes a wall normally and bounces back with a speed of 4.00 m/s. The mass was in contact with the wall for 0.200 s. Find: a) the change of momentum of the mass b) the average force the wall exerted on the mass

physics
For cars having the same shape but different size engines the maximum power developed by the car’s engine is proportional to the third power of the car’s maximum speed. Predict the dependence on speed of the wind resistance force.

physics
A car of mass 1200 kg starts from rest, accelerates uniformly to a speed of 4.0 m/s in 2.0 s and continues moving at this constant speed in a horizontal straight line for an additional 10 s. The brakes are then applied and the car is brought to rest in 4.0 s. A constant ...

Physics
A 25.0 kg block is very slowly raised up a vertical distance of 10.0 m by a rope attached to an electric motor in a time of 8.2 s. Calculate the power developed in the motor.

Physics
An object is dropped from a height H and reaches the ground with a velocity v. The same object is thrown down from the same height H with an initial velocity v and reaches the ground with a velocity v2. Which of the following is the relationship between v2 and v? The answer is...

Physics! NEED HELP!
A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?

Physics!
A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?

Physics
A(n) 94 kg clock initially at rest on a horizontal floor requires a(n) 697 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 530 N keeps it moving with a constant velocity. The acceleration of gravity is 9.81 m/s2 Find µk between the ...

Physics
A block with a weight of 3.7 N is launched along a slope upwards by a spring with k = 2.25 kN / m. The slope makes an angle of 30° with the horizontal and has a vertical height of 0.75 m (measured from the starting point of the block). When the block is released, the spring ...

Maths, Physics, Resultant force
Hi all, I have been given component x- and y- for F1=(8.0*10^7N,7.0*10^7N) F2=(4.0*10^7N,-2.0*10^7N) for an object. Which following my textbooks have found the following vector components: F1+F2=(1.2*10^8N,5.0*10^7N) Now I want to find the distance from earth that this object ...

Physics
Beth, a construction worker, attempts to pull a stake out of the ground by pulling on a rope that is attached to the stake. The rope makes an angle of 44.8 ◦ with the horizontal. If Beth exerts a force of 146.8 N on the rope, what is the magnitude of the upward component of ...

Physics - Fluids
A helium balloon (mass including fill gas 2.1 g) is tied to a long string (mass per unit length is 3.1*10^2 g/cm, i.e., one cm of the string has a mass of 3.1*10-2 g). It rises to a height x of 210 cm, with the remainder of the string laying on the floor. If the density of air...

physics
A warehouse worker pushes a crate along the floor, as shown in the figure below, with a force of F = 10.5 N that points at an angle of θ = 61°. Find the horizontal and vertical components of the force.

physics
A 50.0 kg mountain climber is rappelling down a steep mountain face. Her foot makes contact with the rock at point A. Her rope attaches to her harness at point B, which is located at x1 = 0.77 m and y1 = 0.42 m relative to point A. Her centre of mass is found at point C, which...

Physics
Ann, a 66.2 kg person throws a 0.0461 kg snowball forward with a ground speed of 39.2 m/s. Billy, with a mass of 54.8 kg, catches the snowball. Both people are on skates (Disregard friction between the skates and the ice. ). Ann is initially moving forward with a speed of 2.02...

Maths, Physics, Resultant force
Hi all, I have been given component x- and y- for F1=(8.0*10^7N,7.0*10^7N) F2=(4.0*10^7N,-2.0*10^7N) for an object. Which following my textbooks have found the following vector components: F1+F2=(1.2*10^8N,5.0*10^7N) Now I want to find the distance from earth that this object ...

Physics
Supposed a skydiver ( mass=75kg ) is falling toward the earth. When the skydiver is 100m above the earth he is moving at 60m/s. At this point calculate the skydiver: Gravitational potential energy Kinetic energy Total mechanical energy

Physics
A ball is battled straight up and returns to the level of the batter after 6.5s determine how high the ball went

Physics
A bal is batted straight up and returns to the level of the batter after 6.5s. Determine how high the ball went. A=-9.8m/s^2

Physics
Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

Physics
Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

physics
021 (part 1 of 3) 10.0 points A block is at rest on the incline shown in the ﬁgure. The coeﬃcients of static and kinetic friction are µs = 0.62 and µk = 0.53, respectively. The acceleration of gravity is 9.8 m/s2 . 36 kg µ 29◦ What is the frictional force acting on ...

Physics
A hummingbird ﬂies 2.7 m along a straight path at a height of 5.3 m above the ground. Upon spotting a ﬂower below, the hummingbird drops directly downward 1.8 m to hover in front of the ﬂower. a) What is the magnitude of the hummingbird’s total displacement? Answer in ...

Physics
A hummingbird ﬂies 2.7 m along a straight path at a height of 5.3 m above the ground. Upon spotting a ﬂower below, the hummingbird drops directly downward 1.8 m to hover in front of the ﬂower. a) What is the magnitude of the hummingbird’s total displacement? Answer in...

Physics
A - A hummingbird ﬂies 2.7 m along a straight path at a height of 5.3 m above the ground. Upon spotting a ﬂower below, the hummingbird drops directly downward 1.8 m to hover in front of the ﬂower. a) What is the magnitude of the hummingbird’s total displacement? Answer...

Physics
A - A hummingbird ﬂies 2.7 m along a straight path at a height of 5.3 m above the ground. Upon spotting a ﬂower below, the hummingbird drops directly downward 1.8 m to hover in front of the ﬂower. a) What is the magnitude of the hummingbird’s total displacement? Answer...

physics
If object B is dropped from a height of 100 m while moving horizontally at 115 m/s. How much time will it take for object B to hit the ground? (round answer to the tenth's place and use "s" to describe your answer)

Physics
A vector drawn 8.5 cm long represents a force of 22 N. What force does a vector that is 16.8 cm long, drawn to the same scale, represent? Answer in units of N.

Physics
A vector drawn 4.7 cm long represents a force of 37 N. How long would you draw a vector for a force of 303.1 N? Answer in units of cm

Physics
A - A golfer takes two putts to sink his ball in the hole once he is on the green. The ﬁrst putt displaces the ball 8.10 m east, and the second putt displaces it 1.99 m south. What displacement would put the ball in the hole in one putt? Answer in units of m. -I got the ...

physics
When bunting, a baseball player uses the bat to change both the speed and direction of the baseball. (b) The baseball has a mass of 0.11 kg; its speeds before and after the bunt are 16 m/s and 12 m/s, respectively; and the bunt lasts 0.023 s. What is the change in momentum of ...

Physics
A loaded tractor-trailer with a total mass of 5000 kg traveling at 3.0 km/h hits a loading dock and comes to a stop in 0.64 s. What is the magnitude of the average force exerted on the truck by the dock?

Physics
A 0.20-kg billiard ball travelling at a speed of 15 m/s? strikes the side rail of a pool table at an angle of 60°. If the ball rebounds at the same speed and angle, what is the magnitude of its change in momentum? I need help!

physics
An aircraft has a take-off speed 180km/h and has length 250m from the start just before take-off a serious snag is detected in the engine and the aircraft failed to take-off. There is a wall at a distance of 270 m from takeoff point

Physics
A tennis ball is projected with a velocity of 3 meter per second at an angle of 39 degree to the horizontal calculate the time of light in second ( take g to be 9.8 meter per second square)

Physics
One ship, sailing east with a speed of 7.5 m/s, passes a certain point at 8A.Mand a second ship sailing north at the same speed, passed the same point at 9:30 A.M. At What time are they closest together and what is the distance between them then?

physics
an airplane flying north is observed from the ground. it's velocity is 225 m/s north. the pilot who is flying the plane measures a velocity of 250m/s north. what is the velocity of the wind that affects the plane

More physics help
A solid cylinder with a radius of 5.08 cm starts from rest at the top of a 12m long ramp inclined 20.3 degrees above the horizontal. When it reaches the bottom of the ramp 3.25s later the cylinder has a final linear velocity of 7.38 m/s. What was the average angular velocity ...

Physics
A placekicker kicks a football with a velocity of 35 m/sec and an angle of 25˚ above the horizontal. When the football is 10 m off the ground, a. What is the horizontal velocity of the ball? b. What is the vertical velocity of the ball? c. What is the total velocity of the ...

Physics Help
A student is trying to reduce the mass of a racing bike to achieve greater acceleration. Which would be more beneficial to reduce (assuming each has identical mass)? a. decrease mass in the frame b. decrease mass in the wheels c. decrease mass in the rider d. these are all equal

Physics
Three point sized bodies each of mass M fixed at three corners of light triangular frame of side length L about an axis perpendicular to the plane of frame and passing through centre of frame the moment of inertia of three bodies is

Physics
A golf ball is shot from a tee, elevated 20m above the green, with an initial speed of 27m/s at an angle of 50° above horizontal. a) What will be the speed of the golf ball before it hits the green, 20m below it started? b) How much time will it take for the ball to travel ...

Physics
a golf ball is shot from a tee which is located 18.0m above the green. The initial velocity of the golf ball is 42.0 m/s at an angle of 50.0 degrees above the horizontal. The ball behaves as an ideal projectile during its flight from the tee to the green(i.e. no air resistance...

Physics
In an 8.00 km race, one runner runs at a steady 12.0 km/h and another runs at 14.6 km/h

Physics
Excellent human jumpers can leap straight up to a height of 100 cm off the ground. To reach this height, with what speed would a person need to leave the ground?

Physics
In a 5.00 km race, one runner runs at a steady 11.3 km/h and another runs at 14.9 km/h . How long does the faster runner have to wait at the finish line to see the slower runner cross?

Physics
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 58.8 m/s2 . The acceleration period lasts for time 5.00 s until the fuel is exhausted. After that, the rocket is in free fall. Max height

Physics
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 58.8 m/s2 . The acceleration period lasts for time 5.00 s until the fuel is exhausted. After that, the rocket is in free fall.