An air track is tilted so that it makes a small angle with the horizontal. An ai

Question

An air track is tilted so that it makes a small angle with the horizontal. An air cart of mass 0.05 kg is given an initial velocity of 5 m/s as measured by photogates. It travels 5 m in 2 seconds up the air track. As the cart moves up the air track, it is observed to slow down and momentarily come to rest. It then begins to slide down the track. Assume negligible friction. What is the speed of the cart when it reaches its starting point again? What is the magnitude of the acceleration for the air cart? If the apparatus is changed to include friction acting upon the carts, which of the following statements would be true regarding the upward motion of the cart in subsequent trials. The cart experiences a larger magnitude acceleration and moves farther up the track The cart experiences a larger magnitude of acceleration and does not move as far up the track The cart experiences a smaller magnitude acceleration and moves farther up the track The cart experiences a smaller magnitude of acceleration and does not move as far up the track

Explanation / Answer

14. The velocity wil be equal to initial velocity as there is no friction=5m/s
15.using S=ut+ 0.5at2

S=5m, u=5m/s, t= 2 s

5=10+2a

a= -2.5m/s2

16. b) The cart experience a larger magnitude of acceleration and does not move as far up the track

this is because friction acts which acts in the direction of the gravitational force therby helping in decelrating the particle

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