1. You apply a force to a cart. The force that you apply is directed to the righ

Question

1. You apply a force to a cart. The force that you apply is directed to the right. Assume that there is friction acting on the cart in addition to your applied force. In what direction is the net frictional force (the sum of the only other forces, besides the one you apply, in the right/left directions)?

a. Left

b. Right

c. There isn’t a net frictional force in either direction.

d. Not enough information is given to determine the direction of the net frictional force.

2. You apply a 58.2N force to a 0.8Kg cart towards the right. The cart accelerates towards the right at a rate of 2.6m/s2. What is the magnitude, in Newtons, of the net frictional force (the sum of the only other forces, besides the 58.2N one you apply)? Please enter only a numerical answer, no units necessary.

3. When you are learning to juggle two balls, one in your right hand and the other in your left hand, you are told to throw the second ball when the first ball has reached its highest point. When you catch the first ball, you are told to throw the first ball back to your right hand when the second ball has reached its highest point. What physical reason best explains this instruction?

Explanation / Answer

1) frictional force always opposses the relative motion between the objects

by this we can say that

net frictional force is left

2) by using Newton's law of motion

Fnet = m*a

(58.2-f) = 0.8*2.6

58.2-(0.8*2.6) = f

frictional force f = 56.12 N

while juggling we need to throw a ball after the first ball reached maximum ,other wise these two balls if they not travelled in the same path they may collide So the given condition is the best practise

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