Question

A)
A skier starts down a 29 ∘ slope. After a vertical drop of 34 m , the slope temporarily levels out and then drops at 23 ∘ an additional 38 m vertically before leveling out again. The coefficient of kinetic friction on both slopes is 0.11, the level stretches is frictionless.

What is the skier's speed on the higher level stretch?

What is the skier's speed on the lower level stretch?

b)

What is the current in a 45 kΩ resistor with 150 Vacross it?

c)

A 14 kg projectile is launched at 380 m/s at a 55 ∘ angle to the horizontal. At the peak of its trajectory it collides with a second projectile moving horizontally, in the opposite direction, at 140 m/s . The two stick together and land 9.3 km horizontally downrange from the first projectile's launch point.

Find the mass of the second projectile?

Answer 1