Force Motion Newton's Laws Energy Heat Transfer

The mass of an object will ALWAYS remain constant no matter where the object is located.

• True

• False

We participated in a simulation were we observed the energy of a skateboarder as it moved up & down a ramp. Based on our observations, the total energy of the skateboarder appeared to decrease. What is the best explanation for the decrease in total energy?

• The energy decreased because it transformed into other forms of energy like heat because of friction.

• The total amount of energy always decreases because energy can be created and/or destroyed.

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Which of the following is an example of a force that acts at a distance?

• A baseball hit by a baseball player's bat.

• An apple falling off of a tree to the ground.

• A water skier gliding across the water.

• A coyote walking along a canal bank.

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Mrs. Halleran dropped a tennis ball on the ground and watched it bounce. At what point does the ball have ONLY potential energy?

• When the ball hit the ground.

• At its highest position when it bounced back up..

Newton's Laws of Motion states that an object in motion should keep moving until some force acts on it. What force would cause a soccer ball to stop rolling?

• Gravity

• Friction

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As an object rolls down a ramp its speed increases. When the object hits the base of the ramp and continues moving across a flat surface it continues moving at a CONSTANT speed. Why?

• Gravity stopped acting on the object.

• The amount of friction increased on the flat part of the tract.

• The forces on the object are balanced, so it will travel at the same speed.

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If I wanted to INCREASE the gravitational forces between two object, then what could I change?

• Increase the density of one of the objects.

• Increase the mass of both objects.

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A Brightline train left the train station then traveled at a constant speed of 70 miles per hour. Which graph best represents this scenario?

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In class, we watched a video clip of Neil Armstrong on the Moon. What is different about Mr. Armstrong on the Moon versus on Earth?

• His mass is different on the Moon.

• His weight is different on the Moon.

A bowling ball is traveling at a speed of 6 meters per second (m/s). How long will it take for the bowling ball to travel 42 meters (m)? Use the formula, S = d/t, to answer the question.

• 7 seconds

• 14 seconds

• 28 seconds

• 56 seconds