Contact Forces Grade 3 Quiz

What is friction?

• Friction is the force that causes an object to speed up when it is in contact with another object.

• Friction is the force that has no effect on the motion of an object when it is in contact with another object.

• Friction is the force that resists the motion of an object when it is in contact with another object.

• Friction is the force that helps the motion of an object when it is in contact with another object.

How does friction help in stopping a moving object?

• Friction creates a force that changes the direction of the object

• Friction creates a force that increases the motion of the object

• Friction creates a force that has no effect on the motion of the object

• Friction creates a force that opposes the motion of the object

What is a push force?

• A force that is applied to an object by pushing it in a certain direction

• A force that is applied to an object by lifting it up

• A force that is applied to an object by twisting it

• A force that is applied to an object by pulling it in a certain direction

What is a pull force?

• The force that occurs when an object is pulled towards another object.

• The force that occurs when an object is pushed away from another object.

• The force that occurs when an object is at rest.

• The force that occurs when an object is lifted.

What is gravity?

• Gravity is the force that has no effect on objects.

• Gravity is the force that makes objects float in the air.

• Gravity is the force that pulls objects toward each other.

• Gravity is the force that pushes objects away from each other.

How does gravity affect objects on Earth?

• It has no effect on objects

• It pushes objects away from the Earth

• It makes objects float in the air

• It pulls objects towards the center of the Earth.

What is tension in a rope or string?

• Force transmitted through the rope when it is pulled tight

• The temperature of the rope

• The color of the rope

• The sound made by the rope when it is pulled

How does tension help in holding objects?

• Tension has no effect on holding objects

• Tension pulls on the object, helping to hold it in place.

• Tension pushes the object away

• Tension makes the object heavier

What is normal force?

• Force exerted by a magnet

• Force exerted by a liquid

• Force exerted by a moving object

• Force exerted by a surface to support the weight of an object

How does normal force act on an object placed on a surface?

• Diagonal to the surface

• Parallel to the surface

• Invisible force

• Perpendicular to the surface