Momentum can be expressed as the product of mass and what else?
- Correct Answer: velocity
- acceleration
- density
- direction
Explanation: If a bowling ball and a ping-pong ball are each moving with a velocity of 5 mph, you intuitively understand that it will require more effort to stop the bowling ball than the ping pong ball because of the greater mass of the bowling ball. Similarly, if you have two bowling balls, one moving at 5 mph and the other moving at 10 mph, you know it will take more effort to stop the ball with the greater speed. It is clear that both the mass and the velocity of a moving object contribute to what is necessary to change the motion of the moving object. The product of the mass and velocity of an object is called its momentum . Momentum is a vector quantity that has the same direction as the velocity of the object and is represented by a lowercase letter p .
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