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Need help in understanding the physics behind these physical moments.
Can someone please help me how in terms of physics the following things happen?
1) Why does a rocket go up? (what I think is that force emmitted from the flames released from the rocket creates a force that heats the ground. Then based on Newton's third law. an equal but opposite force he created on ground that acts on the rocket forcing the rocket to go up. That all I can think of.)
2) In Newtons's cradle what happens when a person lifts one marble and let it go? (I mean I understand that energy from the marble that is lifted gets transferred to all the other marbles inbetween cause the, marble at the other end to rise. But is this a good enough explanation?)
3) Two hockey pucks are on ice. One is mass M and the other is mass m. M > m. Same force is applied to each. Same distance, A, is traveled. As m reaches A, is its speed larger or less than M. (I think as m reaches A it has a bigger velocity because since it has a lesser mass than M it can go faster because it has less I guess inertia preventing it from slowing down?)
4) Two cars collide. What can you say about the forces each feels if one car is much heavier than the other. The speed of each car is different. (I think the heavier car feels a lesser force than the lighter car, can really think of a physical reason why though.)
5) Why do astronauts experience weightlessness? Is there really no gravity in space?
(I know that there is gravity in space but it is a lot less compared to the Earth beause od distance. Since the force of gravity is so much less in space, people feel weightless.)
I need to explain these concepts in atleast two sentences. What I have thought of so far is in the parenthesis. Can someone please help me out. I would greatly appreciate it...
Can someone please help me how in terms of physics the following things happen?
1) Why does a rocket go up? (what I think is that force emmitted from the flames released from the rocket creates a force that heats the ground. Then based on Newton's third law. an equal but opposite force he created on ground that acts on the rocket forcing the rocket to go up. That all I can think of.)
2) In Newtons's cradle what happens when a person lifts one marble and let it go? (I mean I understand that energy from the marble that is lifted gets transferred to all the other marbles inbetween cause the, marble at the other end to rise. But is this a good enough explanation?)
3) Two hockey pucks are on ice. One is mass M and the other is mass m. M > m. Same force is applied to each. Same distance, A, is traveled. As m reaches A, is its speed larger or less than M. (I think as m reaches A it has a bigger velocity because since it has a lesser mass than M it can go faster because it has less I guess inertia preventing it from slowing down?)
4) Two cars collide. What can you say about the forces each feels if one car is much heavier than the other. The speed of each car is different. (I think the heavier car feels a lesser force than the lighter car, can really think of a physical reason why though.)
5) Why do astronauts experience weightlessness? Is there really no gravity in space?
(I know that there is gravity in space but it is a lot less compared to the Earth beause od distance. Since the force of gravity is so much less in space, people feel weightless.)
I need to explain these concepts in atleast two sentences. What I have thought of so far is in the parenthesis. Can someone please help me out. I would greatly appreciate it...