Question

A 6 kg bowling ball moves with a speed of 3 m/s. How fast does a 7 kg bowling ball need to move so that it has the same kinetic energy?

Answer 1

Answer: 7 kg bowling ball must move with a speed of 2.8 m/s so that it has the same kinetic energy.

Step-by-step explanation:

Kinetic energy is the energy possessed by a body by virtue of its motion.

`K.E=(1)/(2)mv^2`

m = mass of object

v= velocity of the object

`K.E=(1)/(2)* 6kg* (3m/s)^2=27Joules`

b) for a 7 kg bowl to have kinetic energy of 27 Joules:

`27J=(1)/(2)* 7kg* v^2`

`v^2=7.7`

`v=2.8m/s`

Thus 7 kg bowling ball must move with a speed of 2.8 m/s so that it has the same kinetic energy