Newton's Laws 1,2 & Gravity

Which statement illustrates Newton’s first law?

• A stone will not move unless something pushes or pulls it
• As a car comes to a stop, the passengers continue to move forward
• A ball rolling across the floor eventually slows down
• All of these answers

A smooth card is placed over a drinking glass. A penny is placed in the middle of the card. When the card is hit with the index finger, the card moves away, and the penny drops into the glass.
Which statement best explains why the penny does not move in the same direction as the card?

• The penny has more inertia than the card.
• The card exerts too much force on the penny.
• There is a little gravity between the card and the penny.
• There is an absence of friction between the penny and the card.

What is the force necessary to accelerate a 1785 kg car at a rate of 50 m/s/s?

• 35.7 N
• 900,000 N
• 40 N
• 89,250 N

The property of matter that resists changes in motion is called:

• Friction
• Inerta
• Gravity
• Weight

What is the unbalanced force on a boy and his skateboard if the total mass of the boy and skateboard is 62 kg and their acceleration is 0.36 m/s/s forward?

• 22.32 N
• 40 N
• 172 N
• 200 N

An exploratory robot was sent to the planet Mars. The gravity on Mars is weaker than the gravity on Earth. Compared to the mass and weight of the robot on Earth, the robot on Mars has...

• equal mass but less weight.
• equal mass and weight.
• less mass but equal weight.
• less mass and weight.

If the mass of an object on Earth is 18 grams, what would the mass of the same object be on the Moon?

• 0 grams
• 32 grams
• 18 grams
• 4 grams

What causes a free falling object to accelerate?

• inertia
• mass
• gravity
• speed

A student stands on a scale, and the scale reads 85 pounds. What is being measured by the scale?

• the force of gravity acting on the student
• the mass of the student
• the air pressure surrounding the student
• the volume of the student

A student drops a bowling ball and an apple from a third-story window. Both objects hit the ground at the same time.
From the experiment the student should conclude that...

• gravity pulls on both objects, causing them to fall at the same rate.
• more air friction is acting on the apple than on the bowling ball.
• the bowling ball speeds up faster than the apple.
• the apple weighs more than the bowling ball.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4