Engineering

1A force of 50 N moves an object 4 m in the direction of the force. How much work is done?

2Find the kinetic energy of a 2 kg mass moving at 3 m/s.

3A motor lifts 500 kg through 10 m in 25 s (g = 9.8 m/s²). Its power output is

4A pulley system lifts 800 N with 250 N effort and has VR 4. Its efficiency is

5Tweezers are an example of a

6Energy cannot be created or destroyed, only changed from one form to another. This is the principle of

7An inclined plane reduces the

8A gear of 20 teeth drives a gear of 60 teeth. The velocity ratio is

9A motor does 6000 J of work in 2 minutes. Its power is

10The efficiency of a machine is always less than 100% because of