7- The kinetic energy of a 20.0 N object is 5.00×10² J. What is the speed of this object?

1. If the kinetic energy of a particle is tripled, by what factor has its speed increased? The speed is Multiplied by a factor= B) If the speed of a particle is decreased by a factor of three, by what factor does its kinetic energy change? the kinetic energy is multiplied by a factor=

2. Consider the concepts of kinetic energy (KE) and gravitational potential energy (GPE) as you complete these questions. A ball is held 1.4 meters above the floor. Use the terms KE of GPE as your answers. A. When the ball is held motionless above the floor, the ball possesses only B. If the ball is dropped, its energy decreases as it falls. C. If the ball is dropped, its energy increases as it falls. D. In fact, in the absence of air resistance, the amount of impact with the floor. energy. energy when the ball is held motionless above the floor equals the amount of energy at

17. The kinetic energy of an 1800-kg truck is 7.2 x 105 J. What is the speed of the truck? A) 25 m/s B) 33 m/s C) 28 m/s 17 m/s E) 21 m/s