What two forces are combined to create the centripetal force on a cart on a roller coaster? 1-gravity and friction 2-friction and normal 3-normal and friction 4-normal and tension

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.

Positive ions differ from neutral atoms in that

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?