Contact and Noncontact Forces

Contact and Noncontact Forces

By Katie Heter

Multiple Choice

What force is being applied to the paperclip?

• Magnetic Force

• Gravitational Force

• Non-contact Forces

• All of the Above

Multiple Choice

What evidence do you have that a gravitational force is being applied to the paperclip?

• The paperclip is floating because of the gravitational force.

• The paperclip falls down when the boy pushes it because of the gravitational force.

• The paperclip flies away because of the gravitational force.

• The string is holding the paperclip down because of gravitational force.

Multiple Choice

Does the paperclip need to be in contact with the Earth in order for the gravitational force to apply to it?

• yes

• no

Multiple Choice

What evidence do you have that a magnetic force is being applied to the paperclip?

• The paperclip is floating because of the magnetic force.

• The paperclip falls down when the boy pushes it because of the magnetic force.

• The paperclip flies away because of the magnetic force.

• The string is holding the paperclip down because of magnetic force.

Multiple Choice

Does the paperclip need to be in contact with the Magnet in order for the magnetic force to apply to it?

• yes

• no

Multiple Choice

What builds up on the balloon when it is rubbed on wool or hair?

• Protons

• Neutrons

• Electrons

Multiple Choice

Does the balloon have to touch the water in order to attract it?

• Yes

• No

• Maybe

Multiple Choice

Does the balloon have to touch the can in order to attract it?

• Yes

• No

• Maybe

Multiple Choice

Gravity

• Contact Force

• Non-contact Force

Multiple Choice

Friction

• Contact Force

• Non-contact Force

Multiple Choice

Static Electricity

• Contact Force

• Non-contact Force

Multiple Choice

Springs

• Contact Force

• Non-contact Force

Multiple Choice

Drag

• Contact Force

• Non-contact Force

Multiple Choice

Magnets

• Contact Force

• Non-contact Force

Multiple Choice

Measure of the force of gravity

• Mass

• Weight

Multiple Choice

Measurement of Matter

• Mass

• Weight

Multiple Choice

Measured in pounds

• Mass

• Weight

Multiple Choice

Measured in Kilograms

• Mass

• Weight

Multiple Choice

Measured in Newtons

• Mass

• Weight

Multiple Choice

Doesn't changed based on location

• Mass

• Weight

Multiple Choice

Changes based on location

• Mass

• Weight

​The blue arrows represent the gravitational force on the Sun and the Earth.

Multiple Choice

Sun gets bigger

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Sun moves farther away

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Sun gets smaller

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Earth gets smaller

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Earth gets farther away

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Earth gets closer

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Sun gets closer

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Mass Increases

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Distance Increases

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Mass Decreases

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Distance Decreases

• Increasing Gravity

• Decreasing Gravity

Multiple Choice

Luis rubbed a balloon on his hair and held the balloon next to a faucet trickling water. He observed that as the balloon was placed close to the water, the stream of water appeared to “bend” to move out of the way. Which of the following forces is responsible for the stream of water moving away from the balloon?

• Gravity

• Magnetism

• Friction

• Electric

Multiple Choice

If a spring is attached to two boards with one board at each end of the spring, and the two boards are pulled far apart to stretch the spring, what force will the spring exert in response?

• It will sag between the two boards.

• It will pull the two boards toward each other

• It will hold the boards steady in one place

• It will spin the boards in opposite directions

Multiple Choice

Imagine two planets,

Planet A and Planet B, in a distant galaxy.

Both planets have the same size, but Planet A has more mass than Planet B. Suppose two identical alien space vehicles land on each planet.

Which of the following statements is true?

• The weight of the space vehicle is greater on Planet A, but the vehicle’s masses are the same on both planets.

• The mass of the space vehicle is greater on Planet A, but the vehicle’s weights are the same on both planets.

• Both the mass and weight of the space vehicle are greater on Planet A.

• Both the mass and weight of the space vehicle are the same on both planets.

Multiple Choice

A ball rolls down from the top of a grassy hill, reaches the bottom of the hill, continues to roll, and then

starts to slow down and comes to a stop. What forces caused this ball's motion?

• Frictional force caused the ball to roll down the hill, but air resistance caused the ball to slow down and stop.

• Magnetic force caused the ball to roll down the hill, but gravity caused the ball to slow down and stop.

• The force of the hill caused the ball to roll down it, but gravity caused the ball to slow down and stop.

• Gravity caused the ball to roll down the hill, but frictional force caused the ball to slow down and stop.

Multiple Choice

Gordon is making a list of forces for his science class.

Which of the following should Gordon NOT list as a force?

• gravity

• friction

• a push or pull

• mass

Multiple Choice

On the moon, a bag of sugar has a weight of 3.7 Newtons (N) and a mass of 2.26 kilograms (kg). Which of the following describes the mass of the sugar on Earth?

• more than its mass on the Moon

• same as its mass on the Moon

• less than its mass on the Moon

• same as is weight on the Moon

Multiple Choice

Some forces require direct contact, while others, like gravity, act at a distance. Which of the following is NOT influenced by gravity?

• Earth's tides

• your weight

• Earth's Orbit

• magnetism

Multiple Choice

Ignoring mass and weight contributed by fuel, what happens when the space shuttle takes off and moves away from Earth?

• Its mass decrease and weight increases

• Its mass increases and weight decreases

• Its mass remains constant and weight decreases

• Its mass remains constant and weight increase

Multiple Choice

Gravity is a force that every mass exerts on every other mass. When you jump up in the air, not only does the Earth exert a gravitational force on you, but you also exert a gravitational force on the Earth. You, of course, fall back down to the Earth.

Which of the following explains why the Earth is not moving toward you when you jump up in the air?

• Earth exerts a gravitational force on itself.

• You don’t weigh enough to affects Earth’s surface.

• Your mass is very small compared to Earth’s mass.

• Earth’s fixed orbit around the Sun keeps it from moving

Multiple Choice

If Earth's mass was cut in half, what would happen to your mass?

• increase because gravitational force increases

• decrease because gravitational force increases

• decrease because gravitational force decreases

• nothing, mass is not affected by gravitational force

Multiple Choice

A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate.

• surface area

• air resistance

• descent velocity

• gravity