During rainy season, friction between wheels of vehicle and road;
a) Very high
b) Less
c) Negligible
d) Doubled
Friction can be reduced by;
a) Oiling surfaces
b) Using ball bearing
c) Making special body shapes
d) All of these
Force of friction can mostly reduce by………
NTS PET -------2018
a) decreasing the ramp angle
b) use the lubricants
c) Rollers or wheel
d) increasing the pulling force
The cyclists bow down low on their bikes to;
a) Be easy
b) Reduce air resistance
c) Increase speed
d) Both b & c
Moon is smaller than the earth, so gravitational force of moon less than the gravitational force of earth;
a) 4 times
b) 6 times
c) 8 times
d) 9 times
With the help of this image, identify the heavily body around which the earth revolves:
NTS PET 24/08/2019 (1:30)
a) Moon
b) Sun
c) Stars
d) planet
