1. 1 quintal=----------?
1 metric ton=--------
m2 represent unit of what-------
1 acre =----
1 hectare=-----
1cm3=-----mm3
1m3=---------cm3,----------mm3
1TMC-----
100 kg
1000 kg
Area
4046.85 m2
10000 m2
1000
1000000 1000000000
2. How can you measure thickness of a paper or a coin using scale
3. State of Rest and Motion :
When there is a change of position of an object with
respect to time, then it is called motion, if it remains
stationary it is called rest
Motion is a relative phenomenon
4.
5.
6.
7.
8.
9. distance displacement
speed velocity
acceleration
Describing motion
How much changed
their position?
How fast/slow?
rate of motion of an
object
Is there any change in
speed/velocity?
length
Length and time
speed and time
odometer.
speedometer
10.
11.
12.
13.
14. Which of the following is true for displacement?
(a) It cannot be zero.
(b) Its magnitude is greater than the distance travelled by the object
15.
16. Speed
• Definitions:
– Speed
• The rate at which something moves a given distance.
• the distance travelled by the object in unit time
17. Speed
General formula for speed:
•Speed = distance / time
•Abbreviations commonly used:
d = distance t = time v = speed
v = d/t
18. Speed
• Faster speeds = greater distances
• Faster speeds – reduce time
• In small time to cover large distance to be speed up
19.
20. Speed
Average speed is the total distance traveled by
an object divided by the time taken to travel that
distance.
Instantaneous speed is an object's speed at a
given instant of time.
24. Acceleration
Acceleration of an object is the rate of change of its velocity
and is a vector quantity.
interval
time
speed
in
change
on
Accelerati
t
v
v
a
i
f
25. The motion of a freely falling bodyis an
example of uniformly accelerated motion
uniform acceleration
non-uniform acceleration
36. When an object moves in a circular path with uniform speed,
its motion is called uniform circular motion.
The change in the velocity could be due to change in
its magnitude or the direction of the motion or both.
37.
38.
39.
40.
41.
42. 1.The distance between two stations is 240 km. A train takes 4
hours to cover this distance. Calculate the speed of the train.
2. Salma takes 15 minutes from her house to reach her school on a
bicycle. If the bicycle has a speed of 2 m/s, calculate the distance
between her house and the school.
3. The basic unit of speed is:
(i) km/min (ii) m/min
(iii) km/h (iv) m/s
4.10. A car moves with a speed of 40 km/h for 15 minutes and then with a
speed of 60 km/h for the next 15 minutes. The total distance covered by
the car is:
(i) 100 km (ii) 25 km
(iii) 15 km (iv) 10 km
