A baseball player hits a ball with a bat. At one moment the force exerted by the bat on the ball is 18,000 N. At that same moment, how much force is exerted on the bat by the ball? a) 18,000 N

b) less than 18,000 N

c) more than 18,000 N

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

How much work would it take to move a coulomb charge across a 4 volt potential difference?

Afaulty model rocket moves in the xy-plane (the positive y direction is vertically upward). the rocket's acceleration has components ax(t) = ? t2 and ay(t) = ? ? ? t, where ? = 2.50 m/s4 , ? = 9.00 m/s2 , and ? = 1.40 m/s3 . at t = 0 the rocket is at the origin and has velocity ~v0 = v0x ? i + v0y ? j with v0x = 1.00 m/s and v0y = 7.00 m/s. (a) calculate the velocity and position vectors as functions of time. (b) what is the maximum height reached by the rocket? (c) sketch the path of the rocket. (d) what is the horizontal displacement of the rocket when it returns to y = 0?