The diagram shows a 'ballistic pendulum'. [Figure 11.1] A pellet of mass m travelling at a speed u hits a stationary block of mass M. The pellet becomes embedded in the block and causes the block to move at a speed v immediately after the impact. When a pellet of mass 2m, travelling at a speed 2u, hits a block of mass 2M, what is the speed of the block immediately after the impact? (Neglect the small increase in the mass of the block as the pellet's mass is added during the collision.)

In which example is it not possible for the underlined body to be in equilibrium?

A person of mass 60 kg stands on accurate bathroom scales, placed on the floor of an elevator (lift) which operates i…

A skydiver, who is falling vertically through the air, opens his parachute. Which row describes the velocity of the s…

The pump of a water pumping system uses 2.0 kW of electrical power when raising water. The pumping system lifts 16 kg…

With which types of wave can the Doppler shift be observed?

A distant star is receding from the Earth with a speed of 1.40 × 10⁷ m s⁻¹. It emits light of frequency 4.57 × 10¹⁴ H…