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Take all 9 MCQs in interactive quiz mode with timer and progress tracking
Newton's first law of motion is valid only in the absence of?
Force
Net force
Friction
Momentum
Does inertia depend upon?
Force
Net force
Mass
Velocity
A boy jumps out of a moving bus. There is a danger of him falling?
Towards the moving bus
Away from the bus
In the direction of motion
Opposite to the direction of motion
A string is stretched by two equal and opposite forces of 10 N each. The tension in the string is?
Zero
5N
10 N
20N
The mass of a body?
Decreases when accelerated
Increases when accelerated
Decreases when moving with high velocity
None of the above
Two bodies of masses $m_{1}$ and $m_{2}$ are attached to the ends of an inextensible string passing over a frictionless pulling such that both move vertically. The acceleration of the bodies is?
$\frac{[(m_{1} \times m_{2})}{(m_{1} +m_{2})]}g$
$\frac{[(m_{1} - m_{2})}{(m_{1} +m_{2})]}g$
$\frac{[(m_{1} + m_{2})}{(m_{1} - m_{2})]}g$
$\frac{[(2m_{1} m_{2})}{(m_{1} + m_{2})]}g$
Which of the following is the unit of momentum?
Nm
$kgm^{-1}$
Ns
$Ns^{-1}$
When a horse pulls a cart, the action is on the?
Cart
Earth
Horse
Earth and cart
Which of the following material lowers friction when pushed between metal plates?
Water
Fine marble powder
Air
Oil