Question 1

Why are seatbelts important according to Newton’s First Law?

Accepted Answer

They provide an unbalanced force to change your motion during a sudden stop

Answer

They reduce gravity

Answer

They remove inertia

Answer

They make forces balanced at all times

Question 2

A block is pushed against a wall and remains at rest. The push is 50N to the right. The wall pushes back with 50N to the left. What is the net force and motion?

Accepted Answer

0 N; the block’s motion doesn’t change

Answer

100 N; speeds up right

Answer

50 N right; speeds up right

Answer

50 N left; speeds up left

Question 3

A grocery cart is already rolling straight at constant speed. The student pushing it suddenly lets go. What happens next and why?

Accepted Answer

It keeps the same motion at first, then slows due to friction (an unbalanced force)

Answer

It speeds up because gravity pulls it forward

Answer

It reverses direction immediately

Answer

It stops instantly because forces are balanced

Related quizzes

Related quizzes