Question

Forces that Change Motion Quick Check - Physical Science A

1-Which of the following best describes the sum of all forces acting on an object?
ANSWER: net force, which is a vector sum

2-Suppose a man is sitting on a chair and exerting 100 N of force downward, while a spring beneath the chair exerts 150 N of force upward. If you assign a negative value to the downward force, what is the net force of this system?
ANSWER: 50 N

3-During a game of pool, a cue ball travels to the left with 70 N of force and collides with the four ball moving with a force of 50 N to the right. If you assign a negative value to the force moving to the right, what is the net force of this system?
ANSWER: 20 N

4-Recall that the formula for momentum is: P=mv
Which of the following correctly shows momentum being calculated?
ANSWER: 45 kg*m/s=(9 kg) (5 m/s)

5-A hockey puck with a mass of 0.12 kg is traveling across the ice at a velocity of 150 m/s downfield. What is the momentum of the hockey puck?
ANSWER: P=18 kg*m/s

If this happens to be the same test questions your answering, these are 100% correct, if not there's another "FORCES THAT CHANGE MOTION QUICK CHECK" that koolkid gives all the answers to, that may be what your looking for

Answer 1

These are 100% correct!! TY!!!