Question

True and False Statement:- 1. Acceleration is a measure of the change in the speed of an object per unit time 2. A body has Non Uniform acceleration if its velocity increases or decreases by unequal amount in equal intervals of time. 3. When velocity of the object changes at a uniform rate, then average velocity is given by the arithmetic mean of initial velocity and final velocity for a given period of time. 4. The velocity of a body can be changed in two ways first by changing the speed of the object and second by changing the direction of motion of the body by keeping the speed constant. 5. The odometer in the car measures the velocity of the car 6. A object is said to have constant or uniform velocity if it travels equal distance in equal intervals of time. 7. A body has uniform acceleration if it travels in a straight line and its velocity increases by equal amount in equal intervals of time.

Answer 1

Answer:

true ......................................

Answer 2

Following are the answers to the given statements:-

1. False  2. True  3. True  4. True  5. False  6. True  7. True

• Acceleration is the change in velocity of an object per unit time. Hence, 1. is false as speed does not consider the direction of travel.
• Uniform acceleration is defined as the change in the velocity of the object by equal amounts in equal intervals of time. Hence, 7. is True
• In Non-uniform acceleration, the velocity increases or decreases by unequal amounts in equal or unequal periods of time intervals. Hence 2. is True.
• Object with uniform velocity travels in the same direction - no change in direction, only change in displacement in equal amounts in equal intervals of time, therefore calculating average velocity, in this case, is similar to calculating average speed i.e the arithmetic mean of the initial and final velocity for a given period of time.
• Velocity depends on the speed and direction of the object. Hence, 4. is True.
• 5. is False as an odometer is a device used to measure the distance traveled by car or automobiles whereas a speedometer is used to measure the speed.