In inertia of motion, the body continues to be in a state of motion with …………… speed in …………… direction unless an external force is applied. (i) variable, zigzag (ii) same, same (iii) same, variable (iv) variable, same

Reason — According to inertia of motion, a body in a state of motion, continues to be in the state of motion with the same speed in the same direction in a straight line unless an external force is applied on it to change its state.