An object is initially moving in the positive direction of an x-axis with a speed of 2.7 m/s. If the constant acceleration of the object is -0.12 m/s2, what distance will it have traveled when it turns around?
2 answers
What must be the radius of an unbanked (flat) curve so that a car can safely travel at a maximum speed of 39 m/s? The coefficient of static friction is 0.70.
v = Vi + a t
v = 0 when it stops
0 = 2.7 - .12 t
y = 2.25 seconds to stop
d = Vi t - (1/2) a t^2
= 2.7 * 2.25 - .5 * .12 * 2.25^2
v = 0 when it stops
0 = 2.7 - .12 t
y = 2.25 seconds to stop
d = Vi t - (1/2) a t^2
= 2.7 * 2.25 - .5 * .12 * 2.25^2
1 answer