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 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?

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.

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"?