The roller coaster ride starts from rest at point A. Rank these quantities from greatest to least at each point: a. Speed b. KE c. PE
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The roller coaster ride starts from rest at point A. Rank these quantities from greatest to least at each point: a. Speed b. KE c. PE
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- Which of the following is NOT an energy unit? (choose one best) a. watt x sec b. watts c. joules d. N x mC7 6.) What is the unit of work? a.) the newton b.) the slug c.) the meter d.) the hour e.) the joule45.) Which of the following would describe gravitational potential energy? a. a book sitting on a shelf b. a rubber band stretched in an upward direction c. an apple sitting on the counter
- a. Gravitational potential energy and mechanical energy Ob. Potential energy and mechanical energy c. Gravitational potential energy and kinetic energy Od. Potential energy and kinetic energy Clear my choice When a stone is dropped from a bridge to a river below, what happens to the gravitational potential energy halfway down? f 2 Select one: O a. The stone has half the amount of gravitational potential energy and double the amount of kinetic energy. O b. The stone has half the amount of gravitational potential energy and half of it has been converted to kinetic energy. O C. The stone gains momentum, and its potential energy decreases and its kinetic energy increases. O d. The stone gains momentum, and its potential energy decreases. Jamie pulls an elastic band that has a spring constant of 45 N/m, producing a 3.0 J increase in potential energy. How far did Jamie hpA car of mass m travelling at a speed v has kinetic energy KE. If the mass of the car is doubled and its speed is halved, the kinetic energy of the card will be a.half as great b.twice as great c.one-fourth as great d.four times as greatIf you double the force and double the distance, work is increased by A. Three times (work triples) B. Four times. C. Two times( work doubles) D. work increased by 2.5 times
- A car drives at 100 km/h. The brakes stop it over 100 m. The car has a mass of 3 tonnes a. What is the work done by the brakes?b. What is the average force applied on the car to stop.A roller coaster cart is starting at rest at a height of 40m. It goes down the track and around a loop. Assuming there is no friction between the track and cart what is the velocity of teh cart when it has come out of the loop at the bottom of the track in miles per hour