Legend

 l = distance t = time v = speed/ velocity Vav = average speed l = change in distance t = change in time v = Change in velocity Vf = final velocity Vi = initial velocity ti = initial time tf = final time aav = average acceleration d = distance

Problems

 Before you start the Problems, be sure to have a pen/pencil and paper for working out the problems, and also a calculator.  If you want to use our java calculator:

1) A toy car is traveling at 1.00 m/s in a straight line along a ramp in a spaceship.  If it speeds up to 2.50 m/s in a time of 0.50 s, what is the magnitude of its average acceleration.

 m/s2

2) A car can screech to a straight line stop from 96.54 km/h in about 3.7 s.  Compute the magnitude of its acceleration, assuming it to be constant.

 m/s2

3) A bicyclist pedaling along a straight road at 25.0 km/h uniformly accelerates at 3.00 m/s2 for 3.00 s.  Find her final speed.

 m/s

4) A bullet fired from a 38-caliber handgun with a 0.152 m barrel attains a muzzle speed of 330 m/s.  Assuming a constant acceleration, how much time does it take the bullet to travel down the barrel?  Use three(3) significant digits.

 x10-4s

5) Cheetah can reach speeds up to 113 km/h.  Starting from rest, one goes to 72 km/h in 2.0 s.
a) Compute the cheetah's maximum acceleration, assuming it to be constant.
b) What minimum distance is required for the cheetah to go from rest to 17.9 m/s?

 a) m/s2
 b) m

6) Assume your reaction time is 0.50 s and the acceleration of your car is -8.2 m/s2.  What is the no-skid stopping distance when the car's speed is initially 26.8 m/s?

 m

7) A ball is dropped from a 50 m building.   How far from the ground will the ball be after 2.5 s.  (ignore air resistance).

 m

 RESULTS

 Formulas Dynamics