Pre AP - Unit 9 Test - Part 1

"An object in motion stays in motion" is which of Newton's Laws of Motion?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of these

You are running forward and you hit a wall. Your friend says, "actually, the wall hits you." Which law makes this true?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of these

Which of the following measurements could apply to an object's weight.

• 10 N
• 25 m/s/s
• 2.3 s
• 18 kg

A train is moving forward and speeding up. Which of the following is true?

• the net force points backward
• the net force is zero
• the net force points downward
• the net force points forward

After pushing fuel down, a rocket reacts by traveling up. Which law explains this?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of these

An archer shoots an arrow. The action force is the force of the bowstring on the arrow. What's the reaction force?

• weight of the ball
• air resistance against the bow
• friction of the ground against the archer's feet
• force of arrow on the bowstring

A motorcycle's engine applies a forward force of 1200 Newtons. There are 150 Newtons of friction and 210 Newtons of air drag acting against the applied force. What is the motorcycle's net force?

• 1140 N
• 840 N
• 1560 N
• None of these

Which law says that every action force has an equal and opposite reaction force?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of these

Which law says that objects with more net force will have more acceleration under the same net force?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• None of these

A 1000-kg black ball and a 1-kg gray ball each have the same acceleration. Which one would have needed more force?

• the black (1000-kg) ball
• the gray (1-kg) ball
• both will be going the same speed
• more information is needed