CSCE TUTORIAL

MOTION

Worksheet – 1

  1. Can the magnitude of the displacement be equal to the distance travelled by an object? Justify by giving an example.

 

  1. A farmer moves along the boundary of a square field of side 10 m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position?

 

  1. What does the odometer of an automobile measure?

 

  1. The odometer of a car reads 2000 km at the start of a trip and 2400 km at the end of the trip. If the trip took 8 h, calculate the average speed of the car in km h–1 and m s–1. 

 

  1. A bus decreases its speed from 80 km h–1 to 60 km h–1 in 5 s. Find the acceleration of the bus.

 

  1. What is the nature of the distance-time graphs for uniform and non-uniform motion of an object? 

 

  1. What can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis?

 

  1. What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis? 

 

  1. What is the quantity which is measured by the area occupied below the velocity-time graph?

 

  1. He brakes applied to a car produce an acceleration of 6 m s-2 in the opposite direction to the motion. If the car takes 2 s to stop after the application of brakes, calculate the distance it travels during this time.

 

  1. A trolley, while going down an inclined plane, has an acceleration of 2 cm s-2. What will be its velocity 3 s after the start?

 

  1. A stone is thrown in a vertically upward direction with a velocity of 5 m s-1. If the acceleration of the stone during its motion is 10 m s–2 in the downward direction, what will be the height attained by the stone and how much time will it take to reach there?

 

  1. Abdul, while driving to school, computes the average speed for his trip to be 20 km h–1. On his return trip along the same route, there is less traffic and the average speed is 30 kmh–1 What is the average speed for Abdul’s trip?

 

  1. A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m s-2, with what velocity will it strike the ground? After what time will it strike the ground?

 

  1. State which of the following situations are possible and give an example for each of these:

          (a) an object with a constant acceleration but with zero velocity

          (b) an object moving in a certain direction with an acceleration in the perpendicular direction. 

 

  1. An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.

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