10 Fig. 10.1 shows a car braking system. The brake fluid is an oily liquid. The brake drum rotates with the wheel of the car.
(a) Explain how pushing the brake pedal makes the brake shoes rub against the drum.
[2]

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.

How did the germans define who was jewish?