Question

A hockey puck has a mass of 0.09 kg and is

at rest. A hockey player makes a shot,
exerting a constant force of 28.8 N on the
puck for 0.12 s. With what speed does it
head toward the goal?

Answer 1

Answer: 4.4 meters per second.

Explanation:

To determine the speed of the puck, we can use the equation for calculating final velocity given an initial velocity of zero, a force applied for a certain amount of time, and the mass of the object. This equation is:

v = F * t / m

where v is the final velocity, F is the force applied, t is the time over which the force is applied, and m is the mass of the object.

In this case, the mass of the puck is 0.09 kg, the force applied is 28.8 N, and the time over which the force is applied is 0.12 s. Plugging these values into the equation above gives us:

v = 28.8 N * 0.12 s / 0.09 kg = 4.4 m/s

So, the puck will head toward the goal with a speed of approximately 4.4 meters per second.