- #1
Dr physics
- 24
- 0
need help with physics please!
heres a list of question I am having difficulty with.
1)define clearly the principle of conservation of momentum and apply this to solve the following problem:
A man weighing 730N stands in the middle of a frozen pound of a radius 5.9m. he is unable to get to the other side becuase of lack of friction between his shoes and the ice. to overcome this problem, he throws his 1.2kg book horizontally towards the north shore at a speed of 5m/s. how long does it take him to reach the south shore?
2) a 40g ball traveling to the right , at 30 cm/s collides, in a stright line, with 80g ball that is at rest. if the collision is perectily elastic, what is the velocity of each ball after collision?
please could you help me with this I am completely a newbie to physics, so please could you help.
thank you very much
heres a list of question I am having difficulty with.
1)define clearly the principle of conservation of momentum and apply this to solve the following problem:
A man weighing 730N stands in the middle of a frozen pound of a radius 5.9m. he is unable to get to the other side becuase of lack of friction between his shoes and the ice. to overcome this problem, he throws his 1.2kg book horizontally towards the north shore at a speed of 5m/s. how long does it take him to reach the south shore?
2) a 40g ball traveling to the right , at 30 cm/s collides, in a stright line, with 80g ball that is at rest. if the collision is perectily elastic, what is the velocity of each ball after collision?
please could you help me with this I am completely a newbie to physics, so please could you help.
thank you very much