三道物理题（英文）

1. A cart on a horizontal track is moving to the left. Can the cart's acceleration be directed to the right? Explain your answer.

A:yes,the acceleration of a body is not
relate to it's motion but it's state of force.

2. Newton's Second Law of Motion can be expressed as F=ma. Is ma a force? Explain your answer.
A:no,ma is the result of the force

3. Two boxes B1 and B2 are in contact with one another on a horizontal table. They are accelerated to the right by Homer's hand H. Identify the forces acting in the horizontal direction on H, B1, and B2 and determine which is the largest. Ignore air resistance and friction.
A:can't understand the action

I am sorry?

1.Yes，if applied a force pointing right there will be a acceleration directed right.

2. ma is not a force in fact coz there is not a real force out there, but we call ma inertial force some time.

3. Force on H pointing Left, F