I bet no one can solve this physics problem?

Question

A steel ball has a mass of 4.0 kg and rolls along a smooth, level surface at 60 m/s. Assume that air resistance is negligible. The kinetic energy is 7200 Joules.

(b) At first, the ball was at rest on the surface. A constant force acted on it through a distance of 20 m to give it the speed of 60 m/s. What was the magnitude of the force?

____N

Answer 1

This is a very simple physics problem that requires little more than basic force dynamics.

However, it's quite obvious that this is a homework question.

If this is not the case, please clarify why you're asking.

Answer 2

You know ... these is a very easy problems I can solve this with my eyes closed!

However, since you bet that nobody can solve this, then I will not burst your bubble.

Answer 3

To get ahead in this world. you should try doing your own home work. Learning these things can get you places in life.

You'll get more confidence, which will cause things like you getting more friends and getting jobs easier.

Cheating and having others do your work for you will leave yourself in a hole.

Answer 4

Use kinematics to find the acceleration of the object over the 20 m distance

60^2 = 40^2 +2a(20)

Now since you have determined the acceleration and you know the  mass, use dynamics, F =ma, to determine the force F.

Answer 5

Lots of people can. You'll be one of them if you spend your creativity on studying instead of asking pseudo-smart questions.