Kinematic Equations Pd Name 1. A race car is traveling at +76 m/s when it slows down at -9 m/s for 4 seconds. How far did the car travel? 2. A bicyclist is traveling at +25 m/s when he begins to decelerate at -4 m/s2. How fast is he traveling after 5 seconds? 3. A ball rolling down a hill was displaced 19.6 m while uniformly accelerating from rest. If the final velocity was 5.00 m/s, how long did it take the ball to reach the bottom of the hill? 4. A person pushing a stroller starts from rest, uniformly accelerating at a rate of 0.500 m/s2. What is the velocity of the stroller after it has traveled 4.75 m? 5. A car starts from rest and accelerates uniformly to reach a speed of 21 m/s in 7.0 s. What was the acceleration? What was the speed of the object after 2.0 seconds?6. A bike rider accelerates uniformly at 2.0 m/s for 10.0 s. If the rider starts from rest, calculate the distance traveled. 7. A cat is moving at 18 m/s when it accelerates at 4 m/s for 2 seconds. What is his new velocity? 8. If a bullet leaves the muzzle of a rifle at 600.0 m/s, and the barrel is 0.90 m long, what was the acceleration of the bullet while in the barrel? 9. The Jamaican bobsled team hit the brakes on their sled so that it decelerates at a uniform rate of 0.43 m/s2. How fast was the bobsled moving before the brakes were applied if it travels 85 m before coming to rest? 10. Lily is jogging with a velocity of 4 m/s when she speeds up to cover a distance of 21 meters in 3 seconds. How fast is Lily running now?vi Use Kinematic Equation 2 for problems 6 - 10 6. A bullet moving horizontally with a velocity of 80.0 m/s strikes a sandbag and penetrates a distance of 0.18 m before coming to rest. How much time does it take for the bullet to come to rest? FAX U . 0 4 8 5 7 0.18=2 ( 80.0 + 0 ) + 222- C VINE, 4010 80.0 7. A car starting at rest steadily increases its speed for 70 meters for 5.0 seconds. What is the car's final velocity? 2& o =set velt 8. Silvia is driving at the speed limit of 25 m/s when she sees an ambulance approaching in her rear-view mirror. To move out of its way, she accelerates to 32 m/s in 3 s. How far did she travel during those 3 s? A 32 27 ( 2S + JE ) 3 DX 63 m 9. At the scene of an accident, a police officer notices that the skid marks of a car are 10 m long. The officer knows that the car skidded for 0.8 seconds. What can the officer estimate for the original speed of the car? 10. A car traveling at 20 m/s applies its brakes and comes to a stop in four seconds. How far does the car travel before coming to a stop? 4omKinematic Equations 1 & 2 Pd Name_ Use Kinematic Equation 1 for problems 1 - 5 Viso VF 1. A car starting at rest increased its speed to 22 m/s with acceleration of 1.8 m/s2. How long was the car accelerating? VF = vi tata 22 = 0+ 1.8 + 1 . 8 2. A car is traveling at 15 m/s. It goes down a hill where it accelerates at 3 m/s2 for 4 s. How fast is it going at the bottom of the hill? of = vit at Vf - Is +3 (4) Tam/s/ VF 3. A roadrunner accelerates at 3 m/s for ten seconds. If his final velocity is 45 m/s, how fast was his initial velocity? us = vit 3 (los 1. Smrs 20 20 4. A car travels at 30 m/s to the north. It has an acceleration of 2 m/s2 to the south for a duration of twelve seconds. What is the final velocity of the car? VF = 30 1 2 ( 12 ) 3gyms Vf a 5. Valerie was speeding down the freeway when she sees a speed detector ahead and slams on her brakes and accelerates at -4.2 m/s2. It takes her 2.5 seconds to slow down to the speed limit of 29 m/s. What was her initial velocity? X