Force, Motion & Gravity MCQs with Answers

Who gave the idea of law of inertia?

• A.Albert Einstein
• B.Isaac Newton
• C.Galileo Galilei
• D.Aristotle

Mach number is a term associated with the speed of

• A.Aeroplanes
• B.Ships
• C.Trains
• D.Rockets

A hypersonic weapon travels at hypersonic speed, which is _ times the speed of sound.

• A.1 to 5
• B.25 to 50
• C.5 to 25
• D.50 to 100

Railway tracks are banked on curves so that:

• A.Necessary centrifugal force may not be obtained from the horizontal component of weight of train
• B.Necessary centripetal force may be obtained from the horizontal component of weight of train
• C.The train may not fall inward due to centrifugal force
• D.Friction between wheels and track may be increased

A helicopter of mass 3×10³ kg rises vertically with a constant speed of 2 m/s. What is the resultant force acting on it?

• A.3×10⁴ N upward
• B.3×10⁴ N downward
• C.Zero
• D.6×10³ N upward

Balloons fly in air, its reason is ?

• A.Low weight
• B.High density
• C.Low density
• D.High pressure

Past Paper MCQ

A body weighs 51 N on the surface of the Earth. What is its weight on Earth?

• A.51 N
• B.5.1 N
• C.510 N
• D.0 N

Past Paper MCQ

The density of gases increases when its?

• A.Pressure increased
• B.Temperature increased
• C.Volume increased
• D.None of these

Past Paper MCQ

Why should an athlete not mold his arm before starting a new exercise?

• A.His body is at peak position
• B.His muscles are fully stretched
• C.His heart rate is at its lowest
• D.His bones are more brittle

Past Paper MCQ

Angle of sector of hammer throw is _?

• A.40°
• B.45°
• C.29°
• D.34.92°