7.grade quiz

True or False?

A dog lying still on the ground is not affected by any force.

• True

• False

True or False?

A dog lying still on the ground is affected by balanced forces.

• True

• False

True or False?

A bicycle moving at a constant speed is under the influence of unbalanced forces.

• True

• False

True or False?

A tennis ball changing direction is under the influence of balanced forces.

• True

• False

True or False?

Balanced forces cannot change the motion of an object.

• True

• False

True or False

When an object is affected by unbalanced forces, its motion either accelerates, slows down, or changes direction.

• True

• False

The diagram shows the forces 1-4 acting on a plane when it is flying. Describe the effects of 1. force?

The diagram shows the forces 1-4 acting on a plane when it is flying. Describe the effects of 2. force?

The diagram shows the forces 1-4 acting on a plane when it is flying. Describe the effects of 3. force?

The diagram shows the forces 1-4 acting on a plane when it is flying. Describe the effects of 4. force?