A student releases a pendulum as shown. The pendulum swings from left to right in 0.8s. What is the period of the harmonic motion?
What is the frequency?

The man fires an 80 g arrow so that it is moving at 80 m/s when it hits and embeds in a 8.0 kg block resting on ice. how far will the block slide on the ice before stopping? a 7.1 n friction force opposes its motion.

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?