MCQ questions for class 9 Science Chapter 8 Motion
Question 1: What is defined as the change in position of an object with respect to its surroundings in a given time?
Speed
Velocity
Acceleration
Motion
Question 2: If an object is moving in a straight line and covers equal distances in equal intervals of time, its motion is said to be:
Uniform motion
Variable motion
Circular motion
Periodic motion
Question 3: The speed of an object is defined as the:
Distance traveled divided by time taken
Time taken divided by distance traveled
Product of distance and time
Ratio of force to mass
Question 4: What is the SI unit of speed?
Meter
Meter per second
Meter per second squared
Kilogram
Question 5: The speed of an object at a particular instant is called its:
Average speed
Instantaneous speed
Uniform speed
Variable speed
Question 6: If an object is moving in a circular path with a constant speed, its motion is called:
Uniform motion
Variable motion
Circular motion
Periodic motion
Question 7: Acceleration is defined as the rate of change of:
Speed
Velocity
Distance
Time
Question 8: What is the SI unit of acceleration?
Meter
Meter per second
Meter per second squared
Kilogram
Question 9: A car moving with a constant speed of 60 km/h for 2 hours covers a distance of:
30 km
60 km
120 km
180 km
Question 10: Which of the following is a scalar quantity?
Velocity
Acceleration
Displacement
Speed
Question 11: The total path covered by an object in motion is called its:
Distance
Displacement
Speed
Velocity
Question 12: If the speed of an object is decreasing, it is said to be undergoing:
Positive acceleration
Negative acceleration
Zero acceleration
Uniform acceleration
Question 13: What is the formula for calculating average speed?
Distance divided by time
Time divided by distance
Product of distance and time
Ratio of force to mass
Question 14: A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is its acceleration?
2 m/s
4 m/s
5 m/s
20 m/s
Question 15: The area under the speed-time graph represents the:
Speed
Distance traveled
Acceleration
Displacement
Question 16: Which of the following is a unit of acceleration?
Meter
Meter per second
Meter per second squared
Kilogram
Question 17: An object is moving with a constant velocity of 5 m/s. What is its acceleration?
0 m/s²
2.5 m/s²
5 m/s²
10 m/s²
Question 18: A ball is thrown vertically upward. What is its acceleration at the highest point of its motion?
9.8 m/s² downward
9.8 m/s² upward
Zero
Depends on the initial speed
Question 19: In a velocity-time graph, the slope of the graph represents the:
Velocity
Displacement
Acceleration
Time
Question 20: If an object is in free fall near the surface of the Earth, what is its acceleration?
2 m/s²
5 m/s²
9.8 m/s²
20 m/s²
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