Physics

Physics, 28.06.2019 18:30, victoriadenning1

Atoy car with a mass of 2kg starts at rest. a spring performs 196 joules of work on the car. what is the toy cars final velocity

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Physics, 10.07.2019 19:30, sugar75

A)a 0.05 kg mass is used to accelerate a cart. at t=1 second, the 0.5 kg cart is at x=0.5 m, at rest. at t=2.5 seconds, the cart is at 1.5 m, traveling at 1.3 ± 0.3 m/s. calculate and compare the impulse with the total change in momentum of the cart and mass. (read the theory and sections 1.5 through 1.7 if you’re not sure how to do this.) b) what would be the effect of air resistance and friction on the final velocity and momentum of the cart? c) if a cart of mass 1.2 kg, traveling at 0.5 m/s, collides elastically with a cart of mass 0.7 kg, initially at rest, what is the final velocity of the first cart? d) if the two carts above stick together after the collision, what is the final velocity of the first cart? e) what is the final velocity of the first cart in (c) if the second cart has mass 1.8 kg? f) what is the final velocity of the first cart in (d) if the second cart has mass 1.8 kg?

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Physics, 19.07.2019 23:00, jhony70

Train car a is at rest when it is hit by train car b. the two cars, which have the same mass, are stuck together and move off after the collision. how does the final velocity of train cars a and b after the collision compare to the initial velocity of train car b before the collision? the final velocity is double train car b’s initial velocity. the final velocity is the same as train car b’s initial velocity. the final velocity is half of train car b’s initial velocity. the final velocity is zero since train car b will stop.

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Physics, 19.10.2019 00:20, smcculleymcculley

A3 kg mass starts from rest at point a, which is at the top of an h= 0.50 m high, frictionless curved ramp. it slides down the ramp, encounters a surface which has a coefficient of friction of μ=0.1 for a length of 1.0 meters. once the mass hits point c, the surface becomes frictionless. finally, the mass encounters a spring (k=100 n/m ), compressing the spring, until the mass comes momentarily to a stop. use conservation of energy to answer each question. (a) what is the magnitude of the velocity of the mass at point b? (b) what is the magnitude of the velocity of the mass at point c? (c) how much does the spring compress when the mass comes momentarily to a stop? (d) after stopping for a moment, the spring expands sending the mass back towards point c. what is the magnitude of the velocity at point c?

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Physics, 31.10.2019 00:31, whitenose

Ablock of mass m=0.4 kg starts from rest and slides down a frictionless ramp, before hitting a spring of spring constant k = 300 n/m placed on a horizontal surface. when the block is at the height of 1.5m above the ground, its velocity is 2m/s. what is the maximum compression of the spring? take g=9.8 m/s^2.

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Atoy car with a mass of 2kg starts at rest. a spring performs 196 joules of work on the car. what is...

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