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IB DP Physics Questions

2.1 Motion

Question 1

A car travels a distance of 120 km to the north and then 80 km to the east. What is the car's total displacement?

A. 140 km northeast

B. 200 km

C. 160 km northeast

D. 100 km northeast

Question 2

Which of the following best describes the difference between speed and velocity?

A. Speed is scalar, while velocity is vector.

B. Speed has direction, while velocity does not.

C. Speed is vector, while velocity is scalar.

D. There is no difference between speed and velocity.

Question 3

A train accelerates uniformly from rest to 30 m/s in 15 seconds. What is its acceleration?

A. 0.5 m/s^2

B. 1 m/s^2

C. 2 m/s^2

D. 4 m/s^2

Question 4

On a distance-time graph, which of the following represents an object at rest?

A. A horizontal line

B. A vertical line

C. A line with a positive slope

D. A line with a negative slope

Question 5

Which of the following is NOT a unit of acceleration?

A. m/s^2

B. km/h^2

C. m/s

D. ft/s^2

Question 6

a) Define the terms 'distance' and 'displacement'. Highlight the main differences between them. [3]

b) A car travels 5 km north, then 3 km south. Calculate its total distance travelled and its resultant displacement. [2]

Question 7

a) Differentiate between 'speed' and 'velocity'. [2]

b) A cyclist covers a displacement of 150 m towards the east in 30 seconds. Calculate the velocity of the cyclist. [3]

Question 8

a) Define 'acceleration'. [2]

b) A car accelerates uniformly from a speed of 10 m/s to 20 m/s in 5 seconds. Calculate its acceleration. [3]

Question 9

a) Explain the difference between average speed and instantaneous speed. [2]

b) A runner completes a 400 m race in 50 seconds. Calculate the average speed of the runner. [2]

c) If the runner took 20 seconds to complete the first 100 m and then sped up for the remaining distance, was his instantaneous speed at the end greater or less than his average speed? Justify your answer. [2]

Question 10

a) Describe the relationship between velocity and acceleration. [2]

b) A car accelerates from rest to 30 m/s in 10 seconds. Calculate its average acceleration. [2]

c) Sketch a velocity-time graph for the car's motion. [2]

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