A ball of mass 2kg and another of mass 4kg are dropped together from a 60feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ration of ___________ a) √2:1 b) 1:4 c) 1:2 d) 1:√2
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A ball of mass 2kg and another of mass 4kg are dropped together from a 60feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ration of ___________
a) √2:1
b) 1:4
c) 1:2
d) 1:√2
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Solved in 2 steps
- 7) Compute the kinetic energy for each of the cases below. Through what distance would a 800-N force have to act to stop each object? (a) A 150-g baseball moving at 40 m/s; (b) a 13-g bullet from a rifle moving at 635 m/s; (c) a 1500-kg Corvette moving at 250 km/h; (d) a 1.8×105-kg Concorde airliner moving at 2240 km/h. 8) Compute the kineticChapter 6 Homewor Miranda Burge • Fall20 - GEORGE> Activities and Due Dates > Chapter 6 Homework ment Score: 3.3% O Resources Give Up? O Hint Check Answer on 1 of 27 It is generally a good idea to gain an understanding of the "size" of units. Consider the objects and calculate the kinetic energy of each one. A ladybug weighing 28.5 mg flies by your head at 4.09 km/h. A 6.55 kg bowling ball slides (not rolls) down an alley at 22.9 km/h. A car weighing 1280 kg moves at a speed of 57.5 km/h. about us careers privacy policy terms of use contact us help MacBook Pro 24 & 41 5 8. T Y U H J K M F.In order to double kinetic energy, the speed should be? A: increased by the factor of two B: increased by the factor of sqrt(2) C: descreased by the factor of sqrt(2) D: decreased by the factor of two
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- A roller coaster car is initially at rest at the top of the track, 10 meters above the ground. The car is released and moves down the track. Calculate the velocity of the car when it is 2 meters above the ground. Use the conservation of mechanical energy.4. The speed of a 1600 kg car increases uniformly from 20 m/s to 30 m/s. (a) What is the increase in its kinetic energy? (b) If the acceleration increases over a distance of 50 m, what force is accelerating the car?When the 5-kg box reaches point A it has a speed VA = 12 m/s. (Figure 1) Figure ( 1 of 1 y=x 9 m B 9 m