Question

During a physics experiment, a fan is used to apply a push to a cart on a horizontal track. A student would like the net force on the cart to be 12 N to the right. The student knows that the friction force on the cart by the track will be 3 N to the left. The fan should exert a force of

a. 15 N to the right

b. 15 N to the left

c. 9 N to the right

d. 9 N to the left

e. None of these

When a net force of 2 newtons is applied to a block, a student measures the acceleration of the block to have magnitude ao. If 5 newtons of net force were applied to the same block, the magnitude of its acceleration would be

a. ao

b. greater than ao but less than 2ao

c. 2ao

d. greater than 2ao but less than 5ao

e. greater than 5ao

Answer 1

1)

Therefore,

Towards the right

Option A) is the right answer.

2)

When F = 5 N,

Therefore a₁is greater than 2a₀ but less than 5a₀.

Option D) is the right answer