A 75-kg person on skis is going down a hill sloped at 30.0 degrees above horizontal. The coefficient of kinetic friction between the skis and snow is 0.15. How fast is the skier going 10.0 s after starting from rest? Please show work A) 78m/s
B) 36m/s
C) 78m/s^2
D) 36m/s^2

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?