Question

6:28 DO
The LTE . l 68%
SELF EVALUATION-2
STD 8
PHYSICS
TIME 1 hr
score 20
1.write an example of a solid lubricant
2........is displacement in unit time,
3 which friction is less than sliding friction?
4.which of the following does not belong to the group. .
(Velocity, acceleration speed, displacement)
5 to 10 carries 2 marks.
1x4-4
5.match the following
When light travels through vacuum
Pushing a trolley
Non contact force
Uniform velocity
A train starting and moving out of a station Contact force
A coconut falling from a coconut tree
Non uniform velocity
6.we are able to walk on the ground without slipping why?
7 what is the acceleration of a car which started from rest and acquired a velocity of 40 m/s in 8 seconds
8.write four methods to reduce friction
9. My displacement is zero though I ran 250 m what is meant by this statement
10.Find out whether the acceleration is positive or negative in the given situations
a A ball rolling on a level ground,
b)A train starting from a station.
c)The motion of a stone thrown up when it goes up
dystone comes down
11.observe the figure showing the path of a body which started from A and moves to C through B.
A
B
60 m
40 m
45
6s
70m
a calculate the speed of the body?
b)what is the velocity of body?
c)what is the velocity of the body when it has taken 5s to reach A back from C.
d)compare the velocity of the body when it reached from A and also reached A from C.
(4)​

Answer 1

Answer:

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