Quiz 3 Review: Acceleration & Newton's Laws

Which of the following best describes Newton's First Law of Motion

• Every action force has an equal and opposite reaction force (Forces occur in pairs)

• F = ma

• An object in motion will stay in motion unless acted on by and unbalanced force and an object at rest will stay at rest unless acted on by and unbalanced force

• Objects with mass have a gravitational force that is directly proportional to the mass of each object and indirectly proportional to the distance between them.

Which of the following best describes Newton's Second Law of Motion

• Every action force has an equal and opposite reaction force (Forces occur in pairs)

• F = ma

• An object in motion will stay in motion unless acted on by and unbalanced force and an object at rest will stay at rest unless acted on by and unbalanced force

• Objects with mass have a gravitational force that is directly proportional to the mass of each object and indirectly proportional to the distance between them.

Which of the following best describes Newton's Third Law of Motion

• Every action force has an equal and opposite reaction force (Forces occur in pairs)

• F = ma

• An object in motion will stay in motion unless acted on by and unbalanced force and an object at rest will stay at rest unless acted on by and unbalanced force

• Objects with mass have a gravitational force that is directly proportional to the mass of each object and indirectly proportional to the distance between them.

The tendency for things to keep moving or remain still. ______________

• inertia

• reaction

• friction

• force

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds
• 35 seconds
• 0.3 seconds
• 3.3 seconds

A ball of clay is thrown at a wall at a velocity of 28.0 m/s.  After it hits the wall, it takes 0.020 s to stop.  What is the acceleration of the clay when it hits the wall?

• 1400 m/s²
• -1400 m/s₂
• 0.56 m/s²
• -0.56 m/s²

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest.  Find the acceleration.

• 30 m/s
• 24 m/s²
• 9 m/s²
• 81 km/hr

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

A dog runs with an initial speed of 7.5 m/s on a waxed floor.  It slides to a stop in 15 seconds.  What is the acceleration?

• -7.5 m/s
• -7.5 m/s²
• -0.5 m/s²
• 7.5 mi//hr

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²