Force, Motion & Gravity MCQs with Answers

If we double the time of flight in projectile motion, the distance it covers becomes _?

• A.Unchanged
• B.Halved
• C.Quadrupled
• D.Doubled

Which of the following is correct for simple machines?

• A.Simple machines magnify the force you use
• B.Simple machines reduce the amount of work done
• C.Simple machines increase the total energy input
• D.Simple machines eliminate friction completely

What will happen to orbital speed of a satellite if its orbital radius (R+h) is half of its initial value?

• A.Increase √2 times
• B.Decrease √2 times
• C.Increase 2 times
• D.Remain unchanged

The sharp knives cut better than blunt ones because ?

• A.They have a thinner blade
• B.They apply more pressure due to a smaller surface area
• C.They are made of harder metal
• D.They have less friction

The minimum number of unequal forces whose sum can equal to zero is _?

• A.2
• B.3
• C.4
• D.5

The distance travelled by a free-falling object after 5 seconds is ?

• A.122.5 m
• B.245 m
• C.49 m
• D.98 m

A rocket moves according to the principle of conservation of _?

• A.Energy
• B.Momentum
• C.Mass
• D.Angular velocity

What is the SI unit of impulse?

• A.Newton
• B.Newton-second
• C.Newton-meter
• D.Joule-second

A wheel makes 3 complete revolutions. What is the total number of radians through which a point on the wheel has rotated?

• A.3π
• B.12π
• C.9π
• D.6π

Work done along a closed path in a gravitational field is?

• A.Maximum
• B.Zero
• C.Minimum
• D.Infinite