Amy has a mass of 50 kg, and she is riding a skateboard traveling 10 meters per second.
What is her momentum?
Responses
5 kg⋅m/s
5 kilograms times meters per second,
10 kg⋅m/s
10 kilograms times meters per second,
50 kg⋅m/s
50 kilograms times meters per second,
500 kg⋅m/s
500 kilograms times meters per second,
The correct response is 500 kg⋅m/s. Momentum is calculated by multiplying mass (in kg) by velocity (in m/s), so the momentum of Amy can be calculated as 50 kg times 10 m/s, which equals 500 kg⋅m/s.
What is it known as when a force is applied to an object for an amount of time?
Responses
impulse
impulse
momentum
momentum
inertia
inertia
acceleration
The correct response is impulse. When a force is applied to an object for an amount of time, it is known as impulse.
A bowling ball has a mass of 6 kg.
What happens to its momentum when its speed increases from 2 m/s to 4 m/s?
Responses
The initial momentum is 12 kg⋅m/s, and the final momentum is 3 kg⋅m/s.
The initial momentum is 12 kilograms times meters per second , and the final momentum is 3 kilograms times meters per second .,
The initial momentum is 6 kg⋅m/s , and the final momentum is 3 kg⋅m/s.
The initial momentum is 6 kilograms times meters per second , and the final momentum is 3 kilograms times meters per second .,
The initial momentum is 12 kg⋅m/s, and the final momentum is 24 kg⋅m/s.
The initial momentum is 12 kilograms times meters per second , and the final momentum is 24 kilograms times meters per second .,
The initial momentum is 6 kg⋅m/s, and the final momentum is 12 kg⋅m/s.
The initial momentum is 6 kilograms times meters per second , and the final momentum is 12 kilograms times meters per second .,
The correct response is "The initial momentum is 12 kg⋅m/s, and the final momentum is 24 kg⋅m/s."
Momentum is calculated by multiplying mass (in kg) by velocity (in m/s). Initially, the bowling ball has a speed of 2 m/s, so its initial momentum is 6 kg * 2 m/s = 12 kg⋅m/s. When the speed increases to 4 m/s, the final momentum is 6 kg * 4 m/s = 24 kg⋅m/s.
A baseball is traveling (+30 m/s) and is hit by a bat. It leaves the bat traveling (−40 m/s).
What is the change in the velocity?
Remember that direction is what makes velocity different than speed.
Responses
−10 m/s
negative 10 meters per second,
−30 m/s
negative 30 meters per second,
−40 m/s
negative 40 meters per second,
−70 m/s
The correct response is −70 m/s.
The change in velocity can be calculated by subtracting the initial velocity from the final velocity. In this case, the initial velocity is +30 m/s and the final velocity is -40 m/s. Thus, the change in velocity is -40 m/s - (+30 m/s) = -70 m/s. The negative sign indicates that the final velocity is in the opposite direction compared to the initial velocity.
A basketball has a mass of 1 kg and is traveling 12 m/s.
What would happen to the velocity if the momentum of the basketball were cut in half?
Responses
It would be tripled.
It would be tripled.,
It would be cut in half.
It would be cut in half.,
It would be doubled.
It would be doubled.,
It would be the same.
The correct response is "It would be halved."
Momentum is directly proportional to velocity, so if the momentum is cut in half, the velocity would also be cut in half. Therefore, the velocity would be halved, resulting in a velocity of 6 m/s.
To calculate Amy's momentum, we can use the formula:
Momentum (p) = Mass (m) x Velocity (v)
Given that Amy has a mass of 50 kg and is traveling at a velocity of 10 m/s, we can plug these values into the formula:
Momentum (p) = 50 kg x 10 m/s
Calculating this equation:
p = 500 kg⋅m/s
Therefore, Amy's momentum is 500 kg⋅m/s.