6: A 320 Kg rock, beginning from rest, slides down a 3 m frictionless ramp that makes a 25° with the
horizontal. The rock hits a stationary cart, m =100 kg, and begins to roll.
A: Use the Newtons laws to determine the speed of the rock at the bottom of the ramp
B: Assume the rock collides with the cart completely ineleastically. What is the speed of the rock-cart
system after the collision.
C: If the collision between the rock and the cart is 0.8 sec. what was the force the cart exerted on the
rock-magnetude and direction.

Why is there friction between objects

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

An alligator swims to the left with a constant velocity of 5 \,\dfrac{\text{m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction. when the alligator sees a bird straight ahead, the alligator speeds up with a constant acceleration of 3 \,\dfrac{\text {m}}{\text s^2}3 s 2 m ? 3, space, start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction leftward until it reaches a final velocity of 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction leftward. how many seconds does it take the alligator to speed up from 5 \,\dfrac{\text {m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction to 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction?