Work and Machines p.80

Work and Machines p.80

1. a) doing work is meant by using a force to move an object.
b) A machine is anything which makes it easier to do work.

2. a) Yes, because you are pushing a mower and you are using a force to move the mower.
b) Yes, because you are using a force to push the brush.
c) Yes, because you are using your leg forces to move the pedals to move the bicycle.
d) Yes because you are using a force to move your eyes through the page.

3. You must eat to keep working because you need to have energy joules to push the force.

4. Spanners, pliers, and can openers are called machines because they make it easier to do work with.

5. Pulley, lever, wedge, wheel and axle, inclined planes, and screws.