Dynamics Practice

What is the gravitational acceleration on Earth?

• Depends on the object's mass

• Approximately 10 m/s² downwards

• There is no acceleration from gravity on Earth

Tags

NGSS.HS-PS2-4

An object weighs 50 N on Earth. What is its mass?

• 5 kg

• 500 kg

• 50 kg

• 10 kg

Tags

NGSS.HS-PS2-1

A chihuahua tackles a big husky. Which experiences a greater force during the collision?

• Chihuahua because he's small

• Husky because he's big

• Neither because of Newton's third law

Tags

NGSS.MS-PS2-1

The earth pulls on the moon and the moon pulls on the earth. Which force of gravity, if either, is larger?

• Earth on moon

• Moon on Earth

• They are equal in magnitude

Tags

NGSS.HS-PS2-4

When you are free falling, what is the only force acting upon you?

• normal force

• force of gravity

• tension force

• magnetic force

Tags

NGSS.HS-PS2-4

Even if we ignore air resistance, heavier objects fall faster than lighter objects.

• True

• False

Tags

NGSS.HS-PS2-4

Billie drops his very heavy math textbook and his very light English reading from the same height. Which, if either, one hits the ground first? (assume no air resistance)

• The textbook

• The English reading

• They hit the ground at the same time

Tags

NGSS.HS-PS2-1

A 25 kg man is riding in an elevator. He is accelerating at 2 m/s² upward.

• 300 N upwards

• His weight?

• 50 N upwards

• Which force always points down?

• 250 N downwards

• Which force (normal or force of gravity) is larger?

• Force of gravity

• His normal force?

• Normal force

• His net force?

Tags

NGSS.HS-PS2-1

A 20 kg cat is riding in an elevator. It is accelerating downwards at -3 m/s².

• 200 N downwards

• Cat's normal force?

• 140 N upwards

• Cat's net force?

• 60 N downwards

• Cat's force of gravity?

Tags

NGSS.HS-PS2-1

Archer is running with a velocity of 50 m/s. He then begins to accelerate at −2 m/s². Does that mean that he is speeding up, slowing down, or staying at the same speed?

• Slowing down

• Speeding up

• Staying at the same speed

Tags

NGSS.HS-PS2-1