Answer:
2s
Explanation:
It takes the car 1 second to decelerate 12m and it decelerated 24m (as 36 - 12 = 24)
Answer:
Velocity
Explanation:
You would be describing the velocity of the car.
Velocity in physics is defined as Vector quantity that describes the displacement of an object with respect to the time it takes to attain it. Displacement is the addition of direction to the speed of an object. The displacement is noted in the question, "traveling eastward". While it is stated that the car travels at 44.704 m/s. Ordinarily, it would have been tagged speed, if not for the direction added to it which makes it velocity.
I hope you understand.
Answer:
Gravity is the centripetal force when the moon orbits the earth.
Assuming the cannonball is fired horizontally, its horizontal velocity stays at a constant 76 m/s. At the point it hits the ground, it has a speed of 89 m/s, so if its vertical velocity at that moment is 
, we have
(taking the negative square root because we take the downward direction to be negative)
Recall that
where 
and 
are the initial and final velocities, respectively; 
is the acceleration; and 
is the change in position of a body. In the cannonball's case, it starts with 0 vertical velocity and is subject to a downward acceleration with magnitude 
. So we have
(which is negative because we take the cannonball's starting position at the top of the cliff to be the origin) so the cliff is about 109 m high.
