5.P.1.1 #7: Schoolnet

Which is an example of trying to increase friction?

• spreading sand onto an icy road

• reducing the weight of an object

• pouring oil into the engine of a car

• waxing the underside of a surfboard

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

Once a space shuttle returns to Earth’s atmosphere, which force helps

the shuttle return to Earth’s surface?

• frictional force

• electrical force

• magnetic force

• gravitational force

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A group of six people are on a boat. Three people are in the front and

three people are in the back. The front of the boat is sinking lower than

the back of the boat. Which best explains why the front of the boat is

sinking lower?

• There are heavier items in the back of the boat than in the front of

  the boat.

• The pressure of the water is greater against the front of the boat.

• The people in the front of the boat are closer together.

• The people in the front of the boat are heavier.

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Two toy race cars are going to be raced down the same ramp. Which

information is most helpful in predicting which car will win the race?

• length of the ramp

• volume of the cars

• slope of the ramp

• mass of the cars

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A person is pushing a lawnmower. Which best describes what is

occurring?

• Mass is being applied to the lawnmower.

• Force is being applied to the lawnmower.

• There is no friction acting on the lawnmower.

• There is no gravity acting on the lawnmower.

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Which best describes the relationship between movement and friction?

• As the rate of friction increases, the rate of movement increases.

• As the rate of friction increases, the rate of movement decreases.

• As the rate of friction decreases, the rate of movement decreases.

• As the rate of friction decreases, the rate of movement is

  unchanged.

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

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What causes a ball to move through the air when it is thrown?

• heat

• force

• friction

• gravity

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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

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