Physics
07.09.2022 11:28
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A 2.7 kg cart is rolling across a frictionless, horizontal track toward a 6.4 kg

A 2.7 kg cart is rolling across a frictionless, horizontal track toward a 6.4 kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts collide, the first cart's velocity is 4.1 m/s, and the second cart's velocity is -1.9 m/s. What was the velocity of the first cart when the second cart was still at rest
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Nopernope11
Nopernope11
4,5(9 marks)

The final speed of the ball is 9 m/s.

Explanation:

We have,

A steel ball is dropped from a diving platform. It is required to find the velocity of the ball 0.9 seconds after its released. It will move under the action of gravity. Using equation of motion to find it as :

v=u+at

u = 0 (at rest), a = g

v=gt\\\\v=10\times 0.9\\\\v=9\ m/s

So, the final speed of the ball is 9 m/s.

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