Questions and Answers
When a body is stationary, which of the following is true? (Select all that apply)
Newton's Third Law is equivalent to the?
In the case of a horse pulling a cart, the force that causes the horse to move forward is the force that:
What is the force exerted on the 2kg block by the 1kg block, given that forces of 6N and 3N are acting on them?
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A force of 6N acts on a body at rest of mass 1 kg. What is the time for which the force acts on the body if it attains a velocity of 30 m/s?
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What would be the weight of a bird cage assembly if a 1 kg bird is inside a 1.5 kg cage?
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When standing still in an elevator, the force felt by a boy with a mass of 40 kg will be greatest when the elevator:
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What would be the reading on the scale if a man weighing 80 kg is in a lift moving upwards with an acceleration of 5 m/s²?
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What is the tension in a uniform thick rope of length 5m, applying a force of 5N at one end, at 1m from that end?
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If the velocity of end 'A' of a rigid rod situated between two smooth vertical walls moves with velocity 'u', what is the velocity of end 'B'?
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What is the net force acting on a body if the linear momentum P varies with time according to P = x + yt²?
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How much average force is necessary to stop a hammer having momentum 25 N-s in 0.05 seconds?
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What speed does a ship of mass 2 × 10^7 kg acquire after being displaced 25 m by applying a force of 25 × 10^5 N?
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What force acts on a body of mass 0.1 kg to achieve a velocity of 10 m/s in 0.1 s?
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A Diwali rocket ejects gases at a velocity of 400 m/s with a rate of 0.05 kg/s. What is the accelerating force on the rocket?
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How much force does a player experience when catching a ball of mass 150 g moving at 20 m/s in 0.1 s?
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When a lift of mass 1000 kg moves upwards with an acceleration of 1 m/s², what is the tension in the string connected to it?
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What is the maximum acceleration with which a 20 kg monkey can climb up a rope when a mass of 25 kg is suspended from it?
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Study Notes
Newton's Laws of Motion: Key Concepts
- A stationary body does not imply no forces act on it; balance of forces is crucial.
- Newton's Third Law correlates with conservation of linear momentum, indicating reciprocal actions.
- In a horse-cart scenario, the horse’s forward movement is due to the ground's reaction force.
Forces and Motion
- Analyzing forces acting on blocks on a frictionless surface is essential for understanding inter-block interactions.
- A force applied to a stationary mass affects its velocity over a time period dependent on the mass.
Weight and Acceleration in Elevators
- The force experienced by a person varies with the elevator’s motion: highest when accelerating upward.
- Scale readings will increase when in ascension due to the interplay of gravitational and inertial forces.
Tension and Acceleration in Ropes
- Understanding tension involves analyzing force distribution within a rope on a frictionless surface.
- Acceleration of mass blocks in a pulley system must consider both gravitational forces and the mechanical advantage.
Momentum and Force Calculations
- Linear momentum varies with time; thus, net force can be established through differentiation with respect to time.
- Stopping a moving object requires calculating the average force based on momentum and time intervals.
Practical Applications of Physics
- Force exerted by a rocket uses combustion dynamics, factoring mass flow and speed of gas ejection.
- When catching moving objects, the exerted force can be derived using the change in momentum over time taken for the action.
Dynamics of Lifts and Tension
- Tension in a lift’s cable is greater when it is accelerating upward, incorporating weight and resultant force from acceleration.
Force Limits in Climbing Situations
- Maximum acceleration allowed for a climber influences tension, considering the threshold before load exceeds structural limits of the rope.
General Notes
- Physics concepts such as acceleration, gravity, mass, and force interactions are essential for analysis in various scenarios.
- Calculations related to force, tension, acceleration, and momentum are crucial in understanding motion dynamics in real-life applications.
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Description
Test your knowledge of Newton's Laws of Motion with this NEET chapter-wise quiz for the 11th-grade physics curriculum. Explore various concepts related to forces and motion through engaging questions designed to enhance your understanding. Prepare effectively for your exams with this chapter-specific assessment.
