Physics 5054 · O Level · Centre of gravity

Centre of gravity — practice question

In Fig. 4.1, a screwdriver with mass 64 g is shown balanced in equilibrium on a pivot.
(a)[1]

On Fig. 4.1, mark the screwdriver’s centre of mass with a C and label it.

(b(i))[1]

The gravitational field strength is $10\,\text{N kg}^{-1}$. Calculate the screwdriver’s weight.

(b(ii))[1]

On Fig. 4.1, draw an arrow labelled W to show the weight of the screwdriver.

(c)[2]

State two conditions that are satisfied when an object is in equilibrium.

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