Semester 1 Review

What is free fall?

• Motion of an object under the influence of air resistance only

• Motion of an object under the influence of a magnetic field

• Motion of an object under the influence of friction only

• Motion of an object under the influence of gravity only

Tags

NGSS.HS-PS2-4

What is the magnitude of the acceleration due to gravity on Earth?

• 20 m/s^2

• 5 m/s^2

• 9.8 m/s^2

• 12 m/s^2

Tags

NGSS.HS-PS2-1

What happens to the velocity of an object in free fall as it falls?

• It remains constant

• It decreases

• It increases

• It oscillates

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Which of the following is possible for an object with balanced forces acting on it? (Choose all that apply)

• at rest

• moving at constant speed

• changing direction

• slowing down

Tags

NGSS.HS-PS2-1

Which diagram best shows person pushing a couch (accelerating) across the floor?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

• normal

• abnormal

• static

• inertia

The hockey puck is moving at a constant velocity across the ice. What forces does the puck experience at this moment?

• None

• Gravity

• Gravity and Normal

• Gravity, Normal, and Friction

• Gravity, Normal, Friction, and Applied

Tags

NGSS.HS-PS2-1

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

Ted is trying to move a fridge through his house, he gets stuck on a carpet and even though he is pushing the fridge, it is not moving. What force is acting against him?

• applied

• static friction

• kinetic friction

• normal

Jane jogs 18 km in 2 hours. Then she walks for 6 km in 2 hours. Find her average speed.

• 9

• 3

• 12

• 6