A bullet is fired horizontally with speed v from a rifle. For a short time t after leaving the rifle, the only force affecting its motion is gravity. The acceleration of free fall is g. Which expression gives the value of the horizontal distance travelled in time t / the vertical distance travelled in time t ?

The speed of an aircraft in still air is 200 km h⁻¹. The wind blows from the west at a speed of 85.0 km h⁻¹. In which…

A stone is thrown vertically upwards from a point that is 12 m above the sea. It then falls into the sea below after …

In the absence of air resistance, a ball thrown horizontally from a tower with velocity v, will land after time T sec…

A π⁺ meson has a charge of +e, where e is the elementary charge. It consists of an up quark and one other quark. What…

What is a scalar quantity?

The value of quantity X has a percentage uncertainty of 2%. The value of quantity Y has a percentage uncertainty of 4…