Circular Motion Equation Questions 24 OR

A 250 kg motorcycle is driven around a 12 meter tall vertical circular track at a constant speed of 11 m/s. Which of the equations below solve for the net force on the motorcycle while its at the bottom of the track?

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A 250 kg motorcycle is driven around a 12 meter tall vertical circular track at a constant speed of 11 m/s. Which of the equations below solve for the net force on the motorcycle while its at the position shown in the above image?

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A 250 kg motorcycle is driven around a 12 meter tall vertical circular track at a constant speed of 11 m/s. Which of the equations below solve for the net force on the motorcycle while its at the position shown in the above image?

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Study the picture.

Car 1 and Car 2 move around a curve that has a radius of 20 m, but at different speeds.

Which statement best compares the cars' centripetal accelerations?

• Car #1's centripetal acceleration is 2-times Car #2's centripetal acceleration.

• Car #2's centripetal acceleration is 2-times Car #1's centripetal acceleration.

• Car #1's centripetal acceleration is 4-times Car #2's centripetal acceleration.

• Car #2's centripetal acceleration is 4-times Car #1's centripetal acceleration.

Study the picture.

Car 1 and Car 2 move at the same speed of 10 m/s. Car 1 turns a curve with a radius of 10 m. Car 2 turns a curve with a radius of 20 m.

Which statement best compares the cars' centripetal accelerations?

• Car #1's centripetal acceleration is 2-times Car #2's centripetal acceleration.

• Car #2's centripetal acceleration is 2-times Car #1's centripetal acceleration.

• Car #1's centripetal acceleration is 4-times Car #2's centripetal acceleration.

• Car #2's centripetal acceleration is 4-times Car #1's centripetal acceleration.

Car 1 moves at a velocity of 10 m/s (moves faster).

Car 2 moves at a velocity of 5 m/s (moves slower).

Car 1 and Car 2 move around the same curve that has a radius of 20 m.

Which is true about centripetal acceleration?

• Car 1 has 2-times the centripetal acceleration as Car 2.

• Car 2 has 2-times the centripetal acceleration as Car 1.

• Car 1 has 4-times the centripetal acceleration as Car 2.

• Car 2 has 4-times the centripetal acceleration as Car 1.

Car 1 and Car 2 move at the same speed of 10 m/s.

Car 1 moves around a curve with a radius of 20 m.

Car 2 moves around a curve with a radius of 10 m.

Which is true about centripetal acceleration?

• Car 1 has 2-times the centripetal acceleration as Car 2.

• Car 2 has 2-times the centripetal acceleration as Car 1.

• Car 1 has 4-times the centripetal acceleration as Car 2.

• Car 2 has 4-times the centripetal acceleration as Car 1.

A bucket of water, with mass m, is attached to an inextensible string that has a length r. At the highest point of the circular path, the Tension is equal to 3mg. What is the centripetal force at this point?

• 3mg

• 4mg

• mg

• 2mg

Planet A has twice the mass of Planet B and the same radius. From this information, what can we conclude about the weight of an astronaut at the surface of Planet A compared to that at the surface of Planet B?

• The weight on Planet A must be twice as great as the weight on Planet B.

• The weight on Planet A must be four times as great as the weight on Planet B.

• The weight on Planet A is the same as the weight on Planet B.

• The weight on Planet A is greater than the weight on Planet B, but we cannot say how much greater.

A planet has a radius one-half that of Earth and a mass one-fifth the Earth’s mass. The gravitational acceleration

at the surface of the planet is most nearly to __________.

• 4 m/s/s

• 8 m/s/s

• 12.5 m/s/s

• 25 m/s/s