A 2.0 kg softball is pitched to you at 20. m/s. You hit the ball back along the same path, and at the same speed. If the bat was in contact with the ball for 0.10 s, the average force the bat exerted was
A) 0.40 kN.
B) 40. N.
C) zero.
D) 0.80 kN.
E) 0.65 kN.
D
You might also like to view...
What is the significance of 8 solar masses in stellar evolution?
What will be an ideal response?
A 60.0-Hz AC generator with a peak voltage of 110 V drives a series RL circuit with R = 10.0 ? and L = 10.0 mH. The peak current in the circuit is
a. 0.963 A. b. 10.3 A. c. 11.0 A. d. 11.9 A. e. 29.2 A.
A real image of a candle formed with a converging lens can be viewed on a screen placed
A. at either focal point of the lens. B. at a single position determined by the distance of the object and the construction of the lens. C. anywhere on the side of the lens from which the light emerges. D. nowhere; that is, it can't be viewed on a screen at all.
When charging two objects by rubbing them together
a. Neither may be a conductor. b. They must be made of different material. c. They will sometimes end up with both being positively charged. d. The heat produced by friction is a necessary part of this process.