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Hi, I have two physics questions I would like to check my answers for. Please help me confirm my answers or explain to me why they are wrong.

1. A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid brick wall. If the wall exerts an average force of 44.1 kN on the car as the wall? bumper is deformed a distance of 38.3 mm, how much work is being done on the car by the 2. A weight lifter can lift 150 kg vertically at a constant speed to a position 2 m over his head. a) How much work does gravity do on the weights? b) How much work does the lifter do on the weights?

[For #1, I got W = -1689J. For #2, I got that (a) was -2940J and (b) was 2940J]

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っ 32. 3X10 m s, displa curintm , oru ok quaity 1470 N ula k don, bel gravity 2 -F: ApeiH t ra uad) 2940 un tu dine uienu

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