The Hogwarts Express travels at m/s, where t is the elapsed time in seconds. Determine the acceleration (in m/s²) it achieves in 3 s.

Tests reveal that a normal driver takes about 0.75 s before he or she can react to a situation to avoid a collision. It takes about 3 s for a driver having 0.1% alcohol in his system to do the same. If the driver with 0.1% alcohol is travelling on a straight road at 72 km/h (20 m/s) and his car can decelerate at 1 m/s², determine the shortest stopping distance (d) from the moment he see the pedestrians.

If a car driving in a large circle of radius 185 m has tangential acceleration of 20 m/s², and an angular velocity of 0.5 rad/s, what is the magnitude of the total acceleration of the car in m/s²?

A wheel has an initial clockwise angular velocity of 10 rad/s and a constant angular acceleration of 3 rad/s². Determine the time and the number of revolutions it must undergo to acquire a clockwise angular velocity of 15 rad/s.

A fisherman reels in his fishing line onto a spool with a diameter of 0.100 meters. If he rotates the spool 3.5 times, how much fishing line does he reel in, in meters?

Which of the following expressions gives the average angular velocity?

Which of the following expressions gives the instantaneous angular acceleration?

Tests reveal that a normal driver takes about 0.75 s before he or she can react to a situation to avoid a collision. It takes about 3 s for a driver having 0.1% alcohol in his system to do the same. If the driver with 0.1% alcohol is travelling on a straight road at 72 km/h (20 m/s) and his car can decelerate at 1 m/s², determine the shortest stopping distance (d) from the moment he see the pedestrians.

The Hogwarts Express travels at m/s, where t is the elapsed time in seconds. Determine the acceleration (in m/s²) it achieves in 3 s.

A ball is rolling down the road at Wheeler’s Hill. Is the acceleration it experiences, as it rolls down the road, "constant acceleration"?