When a toothpaste tube is squeezed, its shape changes. The force responsible for this is an example of:
- ✓Balanced forces.
- BCentripetal forces.
- CUnbalanced forces.
- DCentrifugal forces.
Answer: A.
View full solution →Question types
Force and Laws of Motion question types
142 questions across 6 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
142
Questions
6
Question groups
5
Question types
01
M.C.Q. [1 M]
20 Q→02Fill in the blank
10 Q→03Do as directed; [1 M ]
40 Q→04Que-Ans (Each of 2 Mark )
37 Q→05Que-Ans (Each of 3 Mark )
25 Q→06Que-Ans (Each of 5 Mark )
10 Q→Sample Questions
Force and Laws of Motion questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to:
- AExert larger force on the ball.
- ✓Reduce the force exerted by the ball.
- CIncrease the rate of change of momentum.
- DKeep the ball in hands firmly.
Answer: B.
View full solution →A passenger in a moving train tosses a coin which falls behind him. This shows that the motion of train is:
- ✓Accelerated.
- BUniform.
- CRetarded.
- DAlong circular track.
Answer: A.
View full solution →When we talk of a force acting on a body, it usually means:
- AElectrical force.
- BBalanced force.
- ✓Unbalanced force.
- DNuclear force.
Answer: C.
View full solution →Which of the following effect cannot be produced by an unbalanced force acting on a body?
- AChange in speed of the body.
- ✓Change in shape of the body.
- CChange in direction of motion of the body.
- DChange in state of rest of the body.
Answer: B.
View full solution →Fill in the following blanks with suitable words: _________ is a measure of the inertia of a body.
Fill in the following blanks with suitable words: Newton’s first law of motion is also called Galileo’s law of ________.
Fill in the following blanks with suitable word: Momentum is a _______ quantity. Its unit is ________.
Fill in the following blanks with suitable words: If there were no unbalanced force of _______ and no ________ resistance, a moving bicycle would go on moving for ever.
Fill in the following blanks with suitable word: In collisions and explosions, the total _______ remains constant, provided that no external _______.
State whether force is a scalar or a vector quantity.
State the relation between the momentum of a body and the force acting on it.
Name the physical quantity whose unit is ‘newton’.
Which physical quantity corresponds to the rate of change of momentum?
What is the usual name of the forces which cannot produce motion in a body but only change its shape?
Explain why, a person travelling in a bus falls forward when the bus stops suddenly.
Calculate the momentum of a toy car of mass $200\ g$ moving with a speed of 5m/s.
View full solution →To take the boat away from the bank of a river, the boatman pushes the bank with an oar. Why?
The velocity of a body of mass $10\ kg$ increases from $4\ m/s$ to $8\ m/s$ when a force acts on it for $2s$.
What is the value of the force?
View full solution →What is the value of the force?
The troops (soldiers) equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on landing?
What is the momentum in $kgm/s$ of a $10\ kg$ car travelling at $(a)\ 5\ m/s\ (b)\ 20\ cm/s,$ and $(c)\ 36\ km/h?$
View full solution →If a balloon filled with air and its mouth untied, is released with its mouth in the downward direction, it moves upwards. Why?
A 1000kg vehicle moving with a speed of $20\ m/s$ is brought to rest in a distance of $50$ metres:
View full solution →- Find the acceleration.
- Calculate the unbalanced force acting on the vehicle.
State the law of conservation of momentum.
An unloaded truck weighing $2000\ kg$ has a maximum acceleration of $0.5\ m/s^2$. What is the maximum acceleration when it is carrying a load of $2000\ kg?$
View full solution →A ball $X$ of mass $1\ kg$ travelling at $2\ m/s$ has a head-on collision with an identical ball $Y$ at rest. $X$ stops and $Y$ moves off. Calculate the velocity of $Y$ after the collision.
View full solution →How long will it take a force of $10\ N$ to stop a mass of $2.5\ kg$ which is moving at $20\ m/s?$
View full solution →A truck of mass $500\ kg$ moving at $4\ m/s$ collides with another truck of mass $1500\ kg$ moving in the same direction at $2\ m/s$. What is their common velocity just after the collision if they move off together$?$
View full solution →A boy of mass $50\ kg$ running at 5m/s jumps on to a $20\ kg$ trolley travelling in the same direction at 1$.5\ m/s.$ What is their common velocity$?$
View full solution →A gun of mass $3\ kg$ fires a bullet of mass $30\ g.$ The bullet takes $0.003\ s$ to move through the barrel of the gun and acquires a velocity of $100\ m/s$. Calculate:
View full solution →- The velocity with which the gun recoils.
- The force exerted on gunman due to recoil of the gun.
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