b) Is distance a scalar or a vector quantity ?
c) What is the SI unit of distance ?
2)a) What is understand by the term 'displacement'
b) Is displacement a scalar or a vector quantity ?
c) State the SI unit of displacement.
3) Differentiate between distance and displacement.
4) Give an example to illustrate the difference between distance and displacement.
5) Give an example of a motion in which the displacement is zero but the distance travelled is not zero.
6) Name the physical quantity that represents the rate of change of displacement.
7) Define the following terms:
a) speed
b) velocity
8) Complete the following table:
Quantity CGS unit SI unit scalar or vector
a) speed ____ ____ ______
b) velocity _____ _____ ______
9) A car moving along a straight line covers a distance of 1 km due east in 100s. Find:
a) the speed of the car.
b) the velocity of the car.
10) What is meant by
a) uniform velocity
b) variable velocity
11) Give one example for each of the following:
a) uniform velocity
b) variable velocity
12) How is the displacement related to time a body moving with uniform velocity ?
13) The velocity of a body at any stand is v m/s towards east and after a time t second , it is v m/s towards west. Find
a) the change in velocity.
b) the rate of change of velocity.
14) Give an example of a motion in which the average velocity is zero but the average speed is not zero.
15) Give an example of a motion in which speed is constant but velocity is variable.
16) Define the following terms:
a) acceleration
b) retardation.
17) Differentiate between acceleration and retardation.
18) State the SI unit of acceleration.
Is acceleration a scalar or vector quantity.
The speed of a particle is constant. Can it have a acceleration ?
if the above answer is yes, give an example.
19) draw a diagram to show the motion of a body whose speed remains constant but the velocity changes continuously.
20) Explain the following terms and give one example of each:
a) uniform acceleration
b) uniform retardation.
21) A student takes 15 minutes to travel from his home to the school with a uniform speed of 5 kmph. What is the distance of his school from the home ?
22) A body starts from rest and acquires a velocity of 20 m/s in 2 s. Find the acceleration.
23) A car takes 3 h to reach from a station A to a station B and then 5 h to return back from the station B to the station A. The distance between the two station is 240 km. Find
a) the total distance travelled by the car.
b) the total displacement of the car.
c) the average speed of the car.
d) the average velocity of the car.
24) A car accelerates at a constant rate of 10 km/h². What does this statement mean?
25) At a certain instant the velocity of vehicle moving in a straight line is 40 km/h. After 2s, the velocity is 46 km/h and 2s later it is 52 km/h. What is the acceleration of the vehicle in m/s²?
26) The following table gives the speed of the four bodies P, Q, R, S, moving in straight lines .
Time speed speed speed speed
of P of Q of R of S
(s) m/s m/s m/s m/s
0 10 10 10 10
10 12 10 7 15
20 14 10 4 6
30 16 10 1 9
Using the information given in the table, answer the following:
a) i) Which body moves with uniform velocity ?
ii) What is its velocity ?
b) i) Which body moves uniform acceleration ?
ii) What is its acceleration ?
c) i) Which body moves with uniform retardation ?
ii) What is its retardation ?
d) What is the velocity of the body R during the 25th second ?
e) What is the type of motion of the body S ?
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