Science 8 Unit Test

Which of the following best defines force?

• A push or pull on an object

• The weight of an object

• The speed of an object

• The color of an object

What unit is used to measure force?

• Kilograms

• Meters

• Newtons

• Liters

Which of the following is an example of a contact force?

• Gravity

• Magnetic force

• Friction

• Electrical force

What type of force keeps the planets in orbit around the sun?

• Friction

• Magnetic force

• Gravity

• Tension

Which of the following is an example of a non-contact force?

• Tension

• Friction

• Gravity

• Magnetic force

In a scenario where two people are pushing a large box from opposite sides with equal force, what is the likely result of the box's motion?

• The box moves in the direction of the stronger person

• The box remains at rest

• The box moves in the direction of the weaker person

• The box spins in place

Which of the following is NOT true about unbalanced forces?

• They can cause a change in speed

• They can cause a change in direction

• They are always present in at rest object

• They can cause an object to start moving

When two forces act on an object in the opposite direction, what is the net force on the object?

• 10 N

• 5 N

• Zero

• 20 N

This law states that "The acceleration of an object is directly proportional to the force applied and inversely proportional to its mass"

The scientist who proposed the "The Three Laws of Motion"