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A baseball of mass 0.145 ππ is moving in the +y-direction with a speed of 1.30 π/π , and a tennis ball of mass 0.0570 ππ is moving in the β π¦- direction with a speed of 7.80 π/π . What are the magnitude and direction of the total momentum of the system consisting of the two balls?
Two vehicles are approaching an intersection. One is a 2500-ππ pickup traveling at 14.0π/π from east to west (the βπ₯-direction), and the other is a 1500-ππ sedan going from south to north (the +π¦-direction) at 23.0 π/π . (a) Find the π₯- and π¦-components of the net momentum of this system. (b) What are the magnitude and direction of the net momentum?
What speed would a 2,000-ππ sport utility vehicle have to attain in order to have π) the same momentum? ππ) the same kinetic energy?
What is the magnitude of the momentum of a 10,000-ππ truck whose speed is 12.0 π/π ?
A glass dropped on the floor is more likely to break if the floor is concrete than if it is wood. Why?
Β A car has the same kinetic energy when it is traveling south at 30 π/π as when it is traveling northwest at 30 π/π . Is the momentum of the car the same in both cases? Explain.
- A mass of 0.5 kg hangs from a spring and stretches it 0.49 m. What is its spring constant?
What is an example of the first law of thermodynamics? 5.0-g bullet traveling at a
speed of 300 m/s enters a tree and exits the other side with a speed of 150 m/s.
Where did the bulletβs lost kinetic energy go, and how much energy was
transferred?
Explain how the following situations are affected by impulse and momentum.
Suppose a plane and a boat are both moving in the same direction along the ocean. The plane is much faster than the boat. Is it correct to assume that the plane will always have a higher momentum compared to the boat? If yes, explain why. If no, explain when the boat can have a higher momentum than the plane. .
Explain how the following situations are affected by impulse and momentum.
1. In a vehicular accident, your momentum changes abruptly and your body experiences a large amount of force. How do airbags save you from experiencing a large enough force to cause serious damage? Explain using the impulse-momentum theorem.
2. In order to catch a ball, a baseball player naturally moves his or her hand
backward in the direction of the ball's motion once the ball contacts the hand. Why do they do this? Explain using the impulse-momentum theorem.
