Unit 1 Practice Test starring Keanu Reeves

Consider Box 1, What is the net force acting on the box?

• 5 N up
• 5 N down
• 5 N left
• 5 N right

Consider Box 2, What is the net force on the box?

• 4 N down
• 4 N up
• 0 N
• 10 N right

When you let go of an untied balloon full of air, air shoots out the opening and the balloon flies around the room. Which of Newton's three laws explains this?

• 1st Law
• 2nd Law
• 3rd Law
• Isaac Newton, Attorney at Law

The planets in our solar system have orbited the sun at the same speed without noticeable change for over 5 billion years. Which of Newton's laws of motion explains this?

• 1st Law
• 2nd Law
• 3rd Law
• Bird Law

A dead elephant with a mass of 1500 kg is moved along a roller coaster track with an acceleration of 4 m/s^2, what is the force acting on the dead elephant?

• 6000 Newtons
• 3000 Newtons
• 375 Newtons
• 0 Newtons

If I add a vector going 10 to the right to a vector going 3 to the left, what will the resultant vector be?

• 7 to the Left
• 7 to the Right
• 13 to the Left
• 13 to the Right

Consider train full of clowns who know what they did and have a momentum of 200,000 kg*m/s and a mass of 10,000 kg. What is the velocity of the clown train?

• 20000 m/s
• 20 m/s
• 300,000 m/s
• 2 m/s

A train of clowns that has a momentum of 200,000 kg*m/s to the right has an inelastic collision with a train of mimes that have a momentum of 150,000 kg*m/s to the left. What is the resulting momentum of the clown-mime wreckage?

• 50,000 kg*m/s to the left
• 50,000 kg*m/s to the right
• 350,000 kg*m/s to the left
• 350,000 kg*m/s to the right

Which of these will make a car crash less painful?

• Bouncing off the other car.
• Having the crash happen over a shorter length of time.
• Having the crash happen over a longer length of time.
• Building a car without crumple zones.

How does an airbag help prevent injury in a car crash?

• By increasing the time your momentum is stopped over.
• By decreasing the amount of momentum you had at the time of the crash.
• By venting hot gasses right into your arms and face.
• By decreasing the time your momentum is stopped over.