Question

If a 40.0 kg object reduces its speed from 30 m/s to 15 m/s in 10 seconds, . What is the formula that could be used ?

Answer 1

for the acceleration?

Answer 2

Or for the force?

Answer 3

You have acceleration a=(15-30)/10=-1.5 m/s^2.

Answer 4

The force F=ma=40*(-1.5)=-60N

Answer 5

The force. Can you show the steps too please ? Thanks .

Answer 6

There's only one step, which is substitution into the formula F=ma, where m is mass and a is acceleration.

Answer 7

Thanks . I just needed that part .

Answer 8

You're welcome.