Question

1. it took 63 seconds for the hockey puck to complete 7 trips across the surface. calculate the magnitude of the average velocity of the puck. a. 0.0 m/s b. 0.07 m/s c. 0.5 m/s d. 2.0 m/s question 10 10. bumper a has been removed. which of the following best describes the motion of the hockey puck after it hits bumper b? a. the hockey puck will continue to travel in a straight line until it comes to rest. b. the hockey puck will begin to travel at a faster velocity now that bumper a is no longer in its path. c. the hockey puck will continue to travel in a straight line at a constant velocity. d. the hockey puck will come to rest after it hits bumper b. question 11 11. justin claims that newtons first law of motion explains why the hockey puck changes direction every time it hits a bumper. which of the following statements best justifies justins claim about the scenario above? a. the hockey puck stopped traveling in a straight line and changed directions because the bumpers applied an unbalanced force onto the hockey puck. b. the hockey puck stopped traveling in a constant velocity and came to rest because the bumpers applied an unbalanced force onto the hockey puck. c. the hockey puck continued to travel in a straight line at a constant velocity because it did not

Explanation:

Step1: Recall velocity formula

Velocity $v=\frac{\Delta x}{\Delta t}$. Since the hockey - puck completes 7 trips across the surface and returns to its starting point (assuming a back - and - forth motion across a surface), the displacement $\Delta x = 0$ (because the initial and final positions are the same).

Step2: Calculate average velocity

$v=\frac{0}{63}=0\ m/s$.

For question 10:

• According to Newton's first law of motion (an object in motion will stay in motion with a constant velocity unless acted upon by an unbalanced force), when the hockey - puck hits Bumper B, the only non - zero force acting on it in the long run is friction. After hitting Bumper B, the hockey - puck will continue to travel in a straight line until the frictional force brings it to rest.

For question 11:

• Newton's first law states that an object will maintain its state of motion (either at rest or moving with a constant velocity) unless acted upon by an unbalanced force. When the hockey - puck hits a bumper, the bumper applies an unbalanced force on the puck, causing it to change direction.

Answer:

Question 9: A. 0.0 m/s
Question 10: A. The hockey puck will continue to travel in a straight line until it comes to rest.
Question 11: A. The hockey puck stopped traveling in a straight line and changed directions because the bumpers applied an unbalanced force onto the hockey puck.