1)
2) a water balloon is thrown toward a target at 18 m/s. If the water balloon has a mass of 0.4 kg, what is its momentum?
A) 7.2 kg • m/s
B) 18.4 kg • m/s
C) 45 kg • m/s
D) 7.2 kg • m
3) what is the momentum of a car with a mass of 2,000 kg moving at a constant velocity of 20 m/s
A) 0 kg • m/s
B) 100 kg • m/s
C) 40,000 kg • m/s
D) 0.01 kg • m/s
4) a large metal ball is at rest and a small rubber ball is moving at a high velocity. When they collide, the large metal ball begins to roll slowly. What must have happened to the momentum of the small rubber ball?
A) it must have decreased
B) it must have become zero
C) it must have stayed the same
D) it must have increased
5) if an astronaut in space pushes off the satellite she is working on, what will happen to her if there are no other acting external forces?
A) she will eventually slow down and come to a stop
B) she will continuously speed up
C) she will periodically change direction
D) she will move in the same direction at the same speed forever
6) which situation best represent a closed environment
A) two balls colliding in deep space
B) two balls colliding under water
C) two balls colliding in mid air
D) two balls colliding in a pool table
7)which force, in real life will have the least effect on a bowling ball rolling down a lane toward bowling pins
A) magnetism
B) gravity
C) friction
D) air resistance
I didn’t put 1 cuz i already got it but I don’t understand the others
@We have found you bruh are you dumb
yall dont know anything
1) The question does not provide any information or context, so it is not possible to determine an answer.
2) To calculate the momentum of an object, we use the formula:
Momentum (p) = mass (m) * velocity (v)
Given:
Mass (m) = 0.4 kg
Velocity (v) = 18 m/s
Using the formula, we can calculate the momentum:
p = 0.4 kg * 18 m/s
p = 7.2 kg • m/s
Therefore, the answer is A) 7.2 kg • m/s.
3) Again, we can use the formula:
Momentum (p) = mass (m) * velocity (v)
Given:
Mass (m) = 2000 kg
Velocity (v) = 20 m/s
Calculating the momentum:
p = 2000 kg * 20 m/s
p = 40,000 kg • m/s
Therefore, the answer is C) 40,000 kg • m/s.
4) When two objects collide, the total momentum before the collision should be the same as the total momentum after the collision, assuming no external forces act.
In this scenario, the momentum of the large metal ball must have increased while the small rubber ball's momentum must have decreased.
Therefore, the answer is A) it must have decreased.
5) According to Newton's first law of motion, an object will continue to move at a constant velocity (or remain at rest) unless acted upon by an external force. Since there are no other acting external forces in this scenario, the astronaut will continue to move in the same direction at the same speed forever.
Therefore, the answer is D) she will move in the same direction at the same speed forever.
6) A closed environment refers to a system where there are no external influences or forces acting on the objects within it.
In this case, the collision of two balls in deep space, where there are no other external forces like gravity or friction, represents a closed environment.
Therefore, the answer is A) two balls colliding in deep space.
7) Among the given options, magnetism, gravity, friction, and air resistance, the force that will have the least effect on a bowling ball rolling down a lane toward bowling pins is gravity.
This is because gravity acts vertically downwards and its effect can be negligible compared to the other forces, assuming the lane is horizontal.
Therefore, the answer is B) gravity.