Third Quarter G7 Reviewer

What happens when a force is applied to an object?

• The object disappears.

• The object changes its motion, shape, or direction.

• The object becomes heavier.

• The object remains unchanged.

Which of the following units can also represent force in the metric system?

• Kilogram per meter squared

• Joule per second

• Kilogram-meter per second squared

• Kilogram per second

How does a spring scale measure force?

• By detecting temperature changes

• By measuring the stretch of a spring caused by force

• By calculating the speed of an object

• By weighing the object directly

When you ride a bike, which force helps stop the bike when you apply the brakes?

• Gravity

• Friction

• Magnetism

• Push force

When you slide a book across a table, what force slows it down?

• Gravity

• Friction

• Magnetism

• Push force

Why is understanding friction important for designing shoes?

• To make shoes heavier for stability.

• To increase grip and prevent slipping.

• To reduce the weight of the shoes.

• To stop air resistance from affecting shoes.

What does it mean when forces on an object are balanced?

• The object moves faster in the direction of the force.

• The object either stays still or moves at the same speed without changing direction.

• The forces cancel gravity, making the object float.

• The forces stop acting on the object.

If a hanging picture does not move, what can you say about the forces acting on it?

• They are balanced because the upward and downward forces are equal.

• They are unbalanced because gravity pulls harder than the wall pushes.

• Only gravity acts on the picture.

• There are no forces acting on the picture.

What happens when unbalanced forces act on a stationary object?

• The object starts to move in the direction of the stronger force.

• The object remains stationary because forces are equal.

• The object moves backward against the force.

• The object becomes lighter.

A car is accelerating on a highway. What does this tell you about the forces acting on it?

• The forces are balanced, so the car maintains constant speed.

• The forces are unbalanced, causing the car to speed up.

• Gravity is the only force acting on the car.

• Friction is stronger than all other forces.