8th Grade Physical Science GMAS review

Explain why a golf ball that is his on the moon travels much farther than a golf ball that is hit with the same force on Earth. 

• The moon has no no gravity
• There is a greater gravitational pull on earth pulling the ball down.
• There is a greater gravitational pull on the moon pulling on the ball
• The earth has no gravity

The tendency of a stationary object to resist being put into motion is known as

• acceleration
• inertia
• weight
• velocity

• Force of the car on the wall is more than the force of the wall on the car
• Force of the car on the wall is equal to the force of the wall on the car
• Force of the car on the wall is going away from the wall
• Force of the care on the wall is less than the force of the wall on the car.

• a lever
• a pulley
• a screw
• a wedge

• 1 and 4
• 2 and 3
• 1 and 2
• 3 and 4

What is the total force and direction?

• 50N to the right
• 350N to the right
• 50N to the left
• The cart doesn't move

Jonas needs to split a log. He has a sledge hammer. What other tool should he also use to split the log?

• a lever
• a pulley
• a wedge
• a fulcrum

What activity makes use of a pulley?

• raising a flag
• a tug-of-war game
• tying a knot to hold down a tent
• a jump-rope game

Which of the following will definitely cause a change in the velocity of a parked car?

• The car experiences an unbalanced force
• All forces acting on the car increase by 1N
• All forces acting on the car decrease by 1N
• The forces acting on the car are equal and balanced

According to Newton's second law of motion, in which of the situations is the object accelerating?

• a book on a shelf
• a rock sitting on the ground
• a helium balloon tied to a lamp post
• a ball that has been thrown upward