Define speed and velocity, then use those definitions to explain why one of these quantities is scalar while the other is vector.
A ball is released from rest and falls vertically. The ball hits the ground and rebounds vertically, as shown in Fig. 2.1.
Without calculation, use Fig. 2.2 to describe the variation with time $t$ of the velocity of the ball from $t = 0$ to $t = 2.1\,\text{s}$. Air resistance is negligible.
Calculate the acceleration of the ball after it rebounds from the ground. Show your working.
Calculate, for the ball, from $t = 0$ to $t = 2.1\,\text{s}$, the distance moved.
Calculate, for the ball, from $t = 0$ to $t = 2.1\,\text{s}$, the displacement from the initial position.
On Fig. 2.3, sketch the variation with $t$ of the speed of the ball.
Calculate, for the ball, from $t = 0$ to $t = 2.1\,\text{s}$, the distance moved.
Calculate, for the ball, from $t = 0$ to $t = 2.1\,\text{s}$, the displacement from the initial position.
On Fig. 2.3, sketch the variation with $t$ of the speed of the ball.