Which of the following quantities is a vector?

In an elastic collision, momentum is conserved as well as well as?

The induced current in a coil always flows in a direction so as to oppose the change that causes it. This statement is known as

Which of the following instruments can be used to compare the magnitudes of charges on two given bodies?

A body of mass 2 kg is released from a point 100 m above the ground. Calculate its kinetic energy 80m  from the point of release.