Question
A 1700 kg car has a speed of 24 m/s. If it takes 7 s to stop the car, what is the impulse and the average force acting on the car?
Answers
bobpursley
Impulse: change momentum: 1700*24
force= impulse/time= 1700*24/7 Newtons
force= impulse/time= 1700*24/7 Newtons
Henry2
or
V = Vo + a*t = 0.
24 + a*7 = 0,
a = -3.43 m/s^2,
F = M*a = 1700 * (-3.43) = -
The negative sign means the force opposes the motion.
V = Vo + a*t = 0.
24 + a*7 = 0,
a = -3.43 m/s^2,
F = M*a = 1700 * (-3.43) = -
The negative sign means the force opposes the motion.