Motion

Motion Worksheet-19

81. A train starting from rest moves with a uniform acceleration of 0.2 m/s² for 5 minutes. Calculate the speed acquired and the distance travelled in this time.

82. Name the two quantities, the slope of whose graph gives:

(a) speed, and (b) acceleration

83. A deer starts from rest, and accelerates at 2 m/s² for 10 seconds. Calculate :

(a) the final velocity

(b) the distance travelled.

Motion Worksheet-20

1. Kinematics deals with cause of motion.

2. Dynamics is concerned with the study of motion without taking into account the causes of motion. Is it true?

3. An object which appears to be at rest, may actually be in motion.

4. The distance time graph for a non-uniform motion is a curved line.

5. The average speed of a body is the total displacement by a body divided by the total time taken to cover this distance.

6. v - t graph of uniform retardation is straight line.

Motion Worksheet-21

1. Displacement can have only + ve value.

2. The acceleration is always directed away from the centre in a uniform circular motion.

3. If the change in velocity in equal intervals of time is not the same, then the object is said to be moving with invariable acceleration.

4. If a body moves with uniform velocity, its acceleration, a = 0.

5. Abody having a uniform velocity will always have a uniform speed.

6. The initial velocity of any freely falling body is  a constant.