The engine of a car produces a torque of $200\mathrm{Nm}$ on the axle of the wheel in contact with the road. The car travels at a constant velocity towards the right:

Copy the diagram of the wheel and show the direction of rotation of the wheel, and the horizontal component of the force that the road exerts on the wheel.

The engine of a car produces a torque of $200\mathrm{Nm}$ on the axle of the wheel in contact with the road. The car travels at a constant velocity towards the right:

State the resultant torque on the wheel. Explain your answer.

(b) The engine of a car produces a torque of $200\mathrm{Nm}$ on the axle of the wheel in contact with the road. The car travels at a constant velocity towards the right:

(iii) The diameter of the car wheel is $0.58 \mathrm{m}$. Determine the value of the horizontal component of the force of the road on the wheel.

Explain what is meant by the centre of gravity of an object.

A flagpole of mass $25 \mathrm{kg}$ is held in a horizontal position by a cable as shown. The centre of gravity of the flagpole is at a distance of $1.5 \mathrm{m}$ from the fixed end.

Write an equation to represent taking moments about the left-hand end of the flagpole. Use your equation to find the tension T in the cable.

A flagpole of mass $25 \mathrm{kg}$ is held in a horizontal position by a cable as shown. The centre of gravity of the flagpole is at a distance of $1.5 \mathrm{m}$ from the fixed end.

Determine the vertical component of the force at the left-hand end of the flagpole.

State the two conditions necessary for an object to be in equilibrium.

A metal rod of length $90 \mathrm{cm}$ has a disc of radius $24 \mathrm{cm}$ fixed rigidly at its centre, as shown. The assembly is pivoted at its centre.

Two forces, each of magnitude $30 \mathrm{N}$, are applied normal to the rod at each end to produce a turning effect on the rod. A rope is attached to the edge of the disc to prevent rotation. Calculate:

The torque of the couple produced by the $30 \mathrm{N}$ forces

A metal rod of length $90 \mathrm{cm}$ has a disc of radius $24 \mathrm{cm}$ fixed rigidly at its centre, as shown. The assembly is pivoted at its centre.

Two forces, each of magnitude $30 \mathrm{N}$, are applied normal to the rod at each end so as to produce a turning effect on the rod. A rope is attached to the edge of the disc to prevent rotation. Calculate:

The tension $\mathrm{T}$ in the rope.