Question

A block of mass of 1kg is hit by a force of magnitude 5 N which causes the block to have an acceleration of magnitude a. If the same block is hit by a force of magnitude 40 N, then which of these is the new magnitude of acceleration of the block?A) 2.8284aB) one eighth of aC) one/ 64 of aD) 8aE) 64a

Answer 1

The acceleration is related to the force and mass by Newton's second law which states:

`a=(F)/(m)`

for the first mass we have:

`a_1=(5)/(1)=5`

If the same block is hit by a force of 40 N then the new acceleration is:

`a=(40)/(1)=40`

Which is eight times the original acceleration; therefore, the answer is D.