ACCELERATION 08 MOTION Class 9th Science (Physics) (Practice Sheet) 1 What is the SI unit of acceleration? A. m/s B. m/s2 C. m/s3 D. m2/s 2 An object is moving with a constant velocity. What can be said about its acceleration? A. Acceleration is zero. B. Acceleration is positive. C. Acceleration is negative. D. Acceleration can be any value. 3 A car starts from rest and accelerates uniformly at 4 m/s2. What will be its velocity after 5 seconds? A. 5 m/s B. 10 m/s C. 20 m/s D. 25 m/s 4 If an object has a negative acceleration, it means the object is: A. Slowing down B. At rest. C. Moving with constant velocity D. Speeding up. 5 A ball is thrown vertically upwards. At the highest point of its trajectory: A. Its velocity is zero and acceleration is zero. B. Its velocity is zero and acceleration is non- zero. C. Its velocity is non-zero and acceleration is zero. D. Its velocity is non-zero and acceleration is non-zero. 6 A bus accelerates from 3 m/s to 5 m/s in 5 s. What is its acceleration? 7 A stone is thrown into the river from a bridge. It takes 4s for the stone to touch the river’s water surface. Compute the height of the bridge from the water level. 8 A car starts from rest and achieves a speed of 54km/h in 3 seconds. Find its acceleration. 9 Define radial acceleration. 10 A boy is running at 7m/s, and skids to a halt in 2 seconds. What will be the acceleration? Page 1 Email: Phone No: Website:
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