Aluminum has an alpha value of 25 x 10^-6 1/degrees C. What is the change in length of a 4850 cm wire at 2 degrees C when the temp increase to 55 degrees
C?

How would doubling the made of an object change the objects potential energy

The force will determine the acceleration.

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?