| The mass of a body at the center of the Earth is zero why? | Due to gravitational force zero at the center. |
| The handles of bags or suitcases are made broad having more area why? | Due to small pressure acting on it |
| A fountain pen comes out why? | Due to low atmospheric pressure |
| It is difficult to cook food at a higher altitude why? | Due to low pressure |
| Causing bleeding from the nose at heights why? | Due to low pressure |
| The strain has no units why? | Due to it is the ratio of same things |
| Quartz and Phosphor bronze regain their original configuration completely after the withdrawal of applied force why? | Due to their perfectly elastic body |
| Siver is used for interconnection of the cell in a solar panel why? | Due to(silver) best conductor of heat and electricity |
| A fan starts when the switch is on why? | Due to conversion of electric energy to mechanical energy |
| When two stones struck, a spark appears why? | Due to conversation of work done into heat |
| The work done by a body is maximum when force and displacement are in the same direction why? | Due to making angle zero between them and Minimum at 90° |
| A rocket is moves upward with velocity 12km/sec, the Scientists are unable to get it back to the Earth why? | Due to escape velocity of anything on the Earth’s surface is 11.2km/s which is higher than it’s limit |
| A geostationary satellite appears to be at a fixed position to an observer on the Earth why? | Due to same revolution of both |
| When a motorcycle moves in the globe in a circus, it is not fall in the globe why? | Due to centripetal force |
| We used lubricants and ball bearing in the wheels of the vehicles why? | Due to avoid friction |
| The weight is felt by a man in a lift is higher that of his original weight when the lift accelerating upwards why? | Due to gravitational force of the earth and vice versa |
| When a fielder catch a ball in the cricket ground he back his hand why? | Due to impulsive force of the ball otherwise the fingurs or palm get injured |
| A bullet Pierce (hole) in a Target but not a stone why? | Due to it’s higher velocity |
| A great force is required to stop a heavy body than a light body why? | Due to higher mass and higher momentum |
| When a gun is fired it push the gun-man back why? | Due to recoiling of gun,Newton’s 3rd law of Motion |
| A high jump athletic event,the athletes made to fall either on a caustioned bed or on a sand bed why? | Due to momentum of his/her body. |
| A person standing in a bus falls backward when bus starts moving suddenly why? | Due to inertia of rest |
| If a block of wooden is pulled from both sides with equal forces , the block will not move why? | Due to net foce acting on the body is zero ie called balanced force |
| A man with a load of 10kg in his head walking around a circular park and covered a distance of 1000 metres and finally stop at his staring point then the total work done by man is zero why ? | Due to displacement covered by him is zero |
| If a body falls freely vertically downward then the value of g is taken as positive why? | Due to increase of velocity of the body. & Vice Versa |
| .A boat floats in water but not a small piece of iron why? | Due to buoyancy |
| Ice floats in a liquid why? | Due to the weight of water displaced is equal to the weight of the ice. |
| The gas balloon rises in air why? | Due to buoyancy |
| Small drops of rain are spherical why? | Due to surface tension |