Question

Solve these 3 problems.

1. A boy of mass 25 kg sits on a see-saw at a distance of 1.5 m from the centre. Determine the torque produced due to the weight of the boy.
2. A bolt requires tightening to a torque of 84 Nm. Determine the length of a wrench which can be used to open
this bolt using a force of 300 N.
3. The torque required to open a door by pulling it is 572 Nm. If the handle is 65 cm away from the hinges,
calculate the minimum force required to open the door.

Answer 1

Answer:

1. 375Nm

2. 0.28m or 28 cm

3. 880N

Explanation:

explained in pic