Acar moves with constant velocity along a straight road. its position is x1 = 0 m at t1 = 0 s and is x2 = 80 m at t2 = 5.0 s . answer the following by considering ratios, without computing the car's velocity. part a what is the car's position at
t = 2.5 s ?
part b what will be its position at
t = 15 s ?

What is the scientific definition of energy that relates to work

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .