Physics Ck12 Ch2

A bus travels 4 km due north and then 3 km due west going from bus station A to bus station B. The bus' displacement from station A to station B is ______km.

• 10
• 5
• 7
• 15

A car travels 4 km due north and then 2 km due west going from town A to town B. The distance traveled by the car is _____ km. 

• 5
• 6
• 2
• 10

Jack runs around his block and ends  back at his house. Each side of his block is 200m. What is Jack's displacement?

• 0
• 800
• 600
• 400

Two persons A and B are walking with speed 5 km/h and 6 km/h respectively in the same direction. Find how far will B be from A after 2 hours?

• 2 km
• 2 mi
• 1 km
• 10 km

Two trains 120m and 100 m in length are running in opposite directions with velocities 52 km/h and 20 km/h. How long will it take for them to completely pass one another?

• 11s
• 15s
• 20s
• 5s

A train is 414 meters long. It takes 23 seconds to pass a tree on the side of the train tracks. What is the speed of the train?

• 68.4 km/h
• .056 km/h
• 9,522 km/h
• 75 km/h

A butterfly flew from a garden to another garden. For the first 2.2 hours, it flew at a constant speed of 25 km/h. For the next 1.8 hours, it flew at a constant speed of 40 km/h. What was the average speed for the whole journey? 

• 31.75 km/h
• 12.5 km/h
• 42 km/h
• 55 km/h

A bike travels at 3.0 m/s and then accelerates to a speed of 8.5 m/s in a time of 2.5 seconds. The average acceleration of the bike is ____ m/s²

• 7
• 2.2
• 8.5
• 3.1

A car accelerates from 20 m/s to 80 m/s in 5 seconds. What is the average acceleration of the car?

• 12 m/s²
• 10 m/2²
• 8.5 m/2²
• 3 m/s²

Using this formula v_f = v_i + at, If a vehicle starts from rest and accelerates forward at 4.5 m/s² for 8s, what is the final velocity of the vehicle?

• 36 m/s
• 24 m/s
• 12 m/2
• 28 m/s