Question

PERIODIC TEST 3 SESSION 2020-202
AM-40
CLASS IX
SUBLECT - SCIENCE
TIME 1:30 Hrs
SECTION -A (PHYSICS)
1
A body is moving with a velocity of 25 m/s. if motion is uniform, what will be velocity after
10 seconds? Justify your answer.
A bus of mass 5000 kg was moving with a speed of 54km/h. On applying brakes, it stopped
in 8 seconds. Calculate the retarding force and distance travelled before stopping.
2
A sphere of mass 40 kg is attracted by a second sphere of mass 15 kg when their centers are
0.2 m apart, with a force of 10-7N. Calculate the value of gravitational constant.
Calculate the value of acceleration due to gravity on moon. Given mass of moon = 7.0 x 10 22
kg, radius of moon = 2.0 x 10 meter, G = 6.6 Xx 10-11-N m2 kg?.
Define kinetic energy Derive formula of kinetic energy of a body moving with velocity "V".
Define power. Write is Sl unit.​

Answer 1

Answer:

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