A car accelerates from rest to a kinetic energy of 2.06 x, Ask an Expert

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Q1. A car accelerates from rest to a kinetic energy of 2.06 x 105 J in a distance of 638 m. How much force did the car's engine deliver to produce this acceleration?

Q2. A traditional watch has a second hand 2.0cm long, from centre to tip.

a) What is the speed of the tip of the second hand

b) what the velocity of the tip is at 20 s? 40 s? 60 s?

c) What is its change in velocity between 15 s and 30 s?

d) What is its average acceleration throughout the same time interval?

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Category:- Physics
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