Part A = they cancel each other.

Internal forces do not affect the conservation of momentum because

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A 1.0 kg object moving at 1.1 m/s collides elastically with a stationary 1.0 kg object, similar to the situation shown in the figure. How far will the initially stationary object travel along a 37° inclined plane? (Neglect friction.)

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Part A = 3.8,5.2 m

Part B = 3.8,5.2 m

Two skaters with masses of 66 kg and 48 kg, respectively, stand 9.0 m apart, each holding one end of a piece of rope.

If they pull themselves along the rope until they meet, how far does each skater travel? (Neglect friction.)

If only the 48 kg skater pulls along the rope until she meets her friend (who just holds onto the rope), how far does each skater travel?

A 12 g bullet moving horizontally at 400 m/s penetrates a 2.1 kg wood block resting on a horizontal surface. If the bullet slows down to 300 m/s after emerging from the block, what is the speed of the block immediately after the bullet emerges?

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Part A = 230Ns

Part B = 780N

Part C = The other car exerts this force on the driver.

A 46 kg driver sits in her car waiting for the traffic light to change. Another car hits her from behind in a head-on, rear-end collision and her car suddenly receives an acceleration of 17 m/s^{2}.

If all of this takes place in 0.30 s, what is the impulse on the driver?

What is the average force exerted on the driver?

What exerts this force?

Part A = 4600 (yes, that’s different than the # of sig figs MP says it wants)

Part B = The center of mass is inside the Earth.

Part C = 456km

In this problem, you will calculate the location of the center of mass for the Earth-Moon system, and then you will calculate the center of mass of the Earth-Moon-Sun system. The mass of the Moon is 7.35×10^{22} kg, the mass of the Earth is 6.00×10^{24} kg, and the mass of the sun is 2.00×10^{30} kg. The distance between the Moon and the Earth is 3.80×10^{5} km. The distance between the Earth and the Sun is 1.50×10^{8} km. Calculate the location x_{cm} of the center of mass of the Earth-Moon system. Use a coordinate system in which the center of the Earth is at x=0 and the Moon is located in the positive x direction. Where is the center of mass of the Earth-Moon system? Calculate the location of the center of mass of the earth-moon-sun system during a full moon. a full moon occurs when the earth, moon, and sun are lined up as shown in the figure. (part c figure) use a coordinate system in which the center of the sun is at and the earth and moon both lie along the positive x direction.