Someone please help with physics question

Posted on 2015-01-21 06:27:00 in Physics by MARC

You are sitting, facing forward, on a train that is moving.

The train comes to a sudden stop and you feel your body move forward.

Why?
A.

You are a “body in motion” and will stay in motion until an unbalanced force acts on you
B.

You are a body at rest and will stay at rest until an unbalanced force acts on you
2.

If the airplane is in flight with a Thrust of 10,000 N and a drag of 10,000 N, is the plane going to accelerate, slow down, or fly at the same speed?
A.

Accelerate, because the forward force is stronger than the backwards force.
B.

Slow down, because the forward and backwards forces are unbalanced.
C.

Fly at the same speed, because the forward and backwards forces are balanced.
3.

What is mass? (Choose the best answer)
A.

The amount of matter in an object
B.

A measure of an object’s inertia
C.

Both A and B
4.

Newton’s 2nd Law says that acceleration is proportional to the unbalanced force put on an object. In plain English, this means:
A.

If you double the force, the acceleration will double too.
B.

If you double the force, the acceleration will decrease to half
C.

If you double the force, the acceleration will triple.
5.

According to Newton’s Second Law of Motion, an object will accelerate if you apply what kind of force?
A.

Frictional Force
B.

Balanced Force
C.

Unbalance force

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