To find the initial kinetic energy (Joules) of the cannonball, we can use the work-energy principle, which states that the work done on an object is equal to the change in its kinetic energy.
The work done on the cannonball can be calculated by multiplying the average force exerted by the cannon by the distance it travels inside the barrel:
Work = Force x Distance
Given:
Average force exerted by the cannon = 67000 N
Distance traveled inside the barrel = 0.76 m
Work = 67000 N x 0.76 m
Work = 50920 J (Joules)
The work done on the cannonball is equal to the change in its kinetic energy. Thus, the initial kinetic energy of the cannonball is 50920 Joules.
A student fires a 70kg cannonball as shown. The cannon exerts an average force of 67000N while inside the .76m long barrel. What’s the initial J?
1 answer