Which of the following best describes the sum of all forces acting on an object?(1 point) Responses net force, which is a vector sum net force, which is a vector sum gravitational force, which is a vector sum gravitational force, which is a vector sum acceleration, which is a vector sum acceleration, which is a vector sum net force, which is a scalar sum

Answer 1

The correct answer is "net force, which is a vector sum."

Answer 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?(1 point) Responses 50 N 50 N 50 kg 50 kg 250 N 250 N -50 N

Answer 3

The net force of this system can be calculated by subtracting the downward force from the upward force.

Upward force = 150 N (positive)
Downward force = -100 N (negative)

Net force = Upward force + Downward force
= 150 N + (-100 N)
= 50 N

So, the net force of this system is 50 N.

Answer 4

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?(1 point) Responses -20 N -20 N 20 N 20 N 20 m/s2 20 m/s2 120 N 120 N

Answer 5

To calculate the net force of this system, we need to add up the forces acting in the same direction and subtract the forces acting in the opposite direction.

Given:
Force of the cue ball = -70 N (negative because it is moving to the left)
Force of the four ball = 50 N (positive because it is moving to the right)

Net force = Sum of forces
= -70 N + 50 N
= -20 N

Therefore, the net force of this system is -20 N.

Answer 6

Recall that the formula for momentum is: P=mvP=mv Which of the following correctly shows momentum being calculated? (1 point) Responses 45 kg*m/s=(9 kg) (5 m/s)45 kg*m/s=(9 kg) (5 m/s)45 kg * m / s = ( 9 kg ) ( 5 m / s ) 45 N=(9 kg) (5 m/s)45 N=(9 kg) (5 m/s)45 N = ( 9 kg ) ( 5 m / s ) 4 kg*m/s=(9 kg) (5 m/s)4 kg*m/s=(9 kg) (5 m/s)4 kg * m / s = ( 9 kg ) ( 5 m / s ) 14 kg*/s=(9 kg) (5 m/s)s

Answer 7

The correct calculation for momentum is:

P = (9 kg) * (5 m/s)

Therefore, the correct option is:

45 kg * m/s = (9 kg) * (5 m/s)

Answer 8

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?(1 point) Responses P=18 kg*m/sP=18 kg*m/sP = 18 kg * m / s P=18 NP=18 NP = 18 N P=8*10−4 kg*m/sP=8*10-4 kg*m/sP = 8 * 10 - 4 kg * m / s M=18 kg*m/s

Answer 9

To calculate the momentum of the hockey puck, we use the formula:

Momentum (P) = mass (m) * velocity (v)

Given:
Mass (m) = 0.12 kg
Velocity (v) = 150 m/s

Momentum (P) = 0.12 kg * 150 m/s
= 18 kg*m/s

Therefore, the momentum of the hockey puck is 18 kg*m/s.