Q1. As part of a safety investigation, two 1300kg cars travelling at 18m/s are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.8s to stop, and (b) car that hits a concrete barrier and takes 0.5s to stop.
Q2. A doubly charged helium atom whose mass is 6.6 10 to 27 kg is accelerated by a voltage of 2200 V.
What will be its radius of curvature if it moves in the plane perpendicular to a uniform 0.308 T field?