a. vf^2=vi^2+2ad solve for d
b. KEfinal=KEinitial+PE initial
1/2 m vf^2=1/2 m 20^2 + mg*50
solve for vf
1.) Auston’s racecar has a speed of 80 m/s when Auston releases a drag parachute. If the parachute causes a deceleration of -4 m/s2, how far will the car travel before it stops?
2.) Jordan throws a golfball straight up from the top of a building 50 meters high. The initial speed of the golfball is 20 m/s and it just misses the edge of the roof when it eventually falls. Neglecting air resistance, find the velocity of the golfball just at the instant it hits the ground.
1 answer