5.P.1.1 Newton's Laws of Motion

Two identical balls are pushed with the same force. One ball is pushed along a flat surface and the other ball is pushed down a slanted surface. Which ball will travel faster and why?

• the ball on the slanted surface, because of decreased friction

• the ball on the slanted surface, because of increased gravity

• the ball on the flat surface, because of decreased gravity

• the ball on the flat surface, because of increased friction

In order for someone to push a heavy box 10 meters across a floor, which must happen?

• The force of the person pushing must be greater than the force of friction.

• The force of the person pushing must be less than the force of friction.

• The force of the person pushing must be less than the force of gravity.

• The force of the person pushing must be greater than the force of gravity.

Which would make a car move fastest?

• moving up a steep slope

• moving up a gradual slope

• moving down a steep slope

• moving down a gradual slope

Which is the best example of a pushing force that reduces the speed of an object?

• a bat hitting a baseball

• a brake rubbing against a wheel

• a pedal turning the wheels of a bicycle

• a skateboard wheel rolling against pavement

Which best describes the role friction plays in the operation of a car?

• Friction makes a car go faster.

• Friction keeps a car from stopping.

• Friction turns the car in a new direction.

• Friction helps a car slow down and stop.

John stands at the top of a steep hill and pushes a ball over the edge with his foot. Which force causes the ball to continue rolling down the hill?

• mass

• gravity

• friction

• air resistance

Jim played ice hockey with his friends. When he hit the puck, it stopped before reaching the goal. Which most likely caused this to happen?

• mass

• friction

• gravity

• momentum