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) Reduce air resistance
b) Be easy
c) Increase speed
d) Both b & c
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The correct answer is a) Reduce air resistance. Cyclists bow down low on their bikes to reduce air resistance. By lowering their body profile, they decrease the surface area exposed to the oncoming air. This streamlined position minimizes the drag force acting against their motion, allowing them to maintain or increase speed with the same amount of effort. |
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 PET24/08/2019 (1:30)
a) Moon
b) Sun
c) Stars
d) planet
Option A is correct.
by at 2025-02-03 13:49:39