Rankers Physics

Kinetic Energy and Momentum: Practice Problem & Solution

A 1 kg mass has a kinetic energy of 1 joule when its speed is :
0.45 m/s
1 m/s
1.4 m/s
4.4 m/s

Solution Explained:

To solve this problem, we apply the core principles of Kinetic Energy and Momentum. Understanding the underlying formula is key to arriving at the correct answer below:

Kinetic Energy K = ½mv²

So, 1J = ½(1)v² so, v= √2 m/s= 1.414 m/s

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