Motion Worksheet-13
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A train travels at a speed of 60 km/h for 0.52 h, at 30 km/h for the next 0.24 h and then at 70 km/h for the next 0.71 h. What is the average speed of the train?
A. 5.99 km/h B. 59.9 km/h
C. 5.9 km/h D. 59.9 m/s
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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 is :
A. 50 km h–1
B. 13.9 ms–1
C. Both 50 km h–1 and 13.9 ms–1
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A moving train is brought to rest within 20 seconds by applying brakes. Find the initial velocity. If the retardation due to brakes is 2 ms–2
A. 10 ms–1 B. 3 ms–2 C. 40 ms–1 D. 40 ms–2
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A scooter moving at a speed of 10 m/s is stopped by applying brakes which produce a uniform acceleration of, –0.5 m/s2. How much distance will covered by the scooter before it stops?
A. 500 metres B. 100 metres
C. 20 metres D. 100 centimetres
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A cyclist goes around a circular track once every 2 minutes. If the radius of the circular track is 105 metres, calculate his speed. (Given ) π = (22/7)
A. 6.2 m/s B. 6.5 m/s C. 5.5 m/s D. 5.2 m/s
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A body starts to slide over a horizontal surface with an initial velocity of 0.5 m/s. Due to friction, its velocity decreases at the rate of 0.05 m/s2 (acceleration, –0.05 m/s2). How much time will it take for the body to stop?
A. 10 seconds B. 1 seconds
C. 100 seconds D. 0.10 seconds
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Usha swims in a 90 m long pool. She covers 180 m in one minute by swimming from one end to the other and back along the same straight path. Find the average speed and average velocity of Usha.
A. average speed is 0 m s–1 and average velocity is 3 m s–1
B. Both are 0 m s–1
C. Both are 3 m s–1
D. average speed is 3 m s–1 and average velocity is 0 m s–1
Answer:
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B
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C
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C
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B
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C
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A
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D
