Physics 11 Kinematics
Lesson 2 Practice Assignment
Acceleration
1. A car is travelling at a constant speed when a force is applied to it and brings it to a stop in 3.8 s. If the force
2
gives the car an acceleration of -3.1 m/s , find:
a) initial speed
b) the distance covered while stopping.
2
2. A car accelerates away from a stop sign at the rate of 2.50 m/s .
a) How long will it take the car to reach a speed of 20.0 m/s?
b) How far will the car travel during this time?
c) How long does it take the car to travel the first 40.0 m?
3. While the car above was travelling at 20.0 m/s, the driver hits the brakes and the car comes to a stop in 60.0 m.
What is the car's deceleration?
ANSWERS
1a) v = 12 m/s
1b) d = 22 m
2a) t = 8.00 s
2b) d = 80.0 m
2c) t = 5.66 s
3. a = -3.33 m/s2
Kinematics Page 1 of 1 Lesson 2
Lesson 2 Practice Assignment
Acceleration
1. A car is travelling at a constant speed when a force is applied to it and brings it to a stop in 3.8 s. If the force
2
gives the car an acceleration of -3.1 m/s , find:
a) initial speed
b) the distance covered while stopping.
2
2. A car accelerates away from a stop sign at the rate of 2.50 m/s .
a) How long will it take the car to reach a speed of 20.0 m/s?
b) How far will the car travel during this time?
c) How long does it take the car to travel the first 40.0 m?
3. While the car above was travelling at 20.0 m/s, the driver hits the brakes and the car comes to a stop in 60.0 m.
What is the car's deceleration?
ANSWERS
1a) v = 12 m/s
1b) d = 22 m
2a) t = 8.00 s
2b) d = 80.0 m
2c) t = 5.66 s
3. a = -3.33 m/s2
Kinematics Page 1 of 1 Lesson 2
