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An object is projected vertically upwards from the ground with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s², what is the maximum height reached by the object?
An object is projected vertically upwards from the ground with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s², what is the maximum height reached by the object?
Maximum height = v₀² / (2g) = (20)² / (2 × 9.8) = 20.4 m
A 2 kg block is moving at 4 m/s when it collides with a stationary block of 3 kg. If the collision is perfectly inelastic, what is the velocity of the combined blocks after collision?
A 2 kg block is moving at 4 m/s when it collides with a stationary block of 3 kg. If the collision is perfectly inelastic, what is the velocity of the combined blocks after collision?
Using conservation of momentum, we get: v = (m₁v₁) / (m₁ + m₂) = (2 × 4) / (2 + 3) = 2.67 m/s
A force of 5 N is applied to an object, causing it to move 2 m in the direction of the force. If the object starts from rest, what is the work done on the object?
A force of 5 N is applied to an object, causing it to move 2 m in the direction of the force. If the object starts from rest, what is the work done on the object?
Work done = Force × Distance = 5 N × 2 m = 10 J
A resistor of 10 Ω is connected to a 12 V battery. What is the current flowing through the resistor?
A resistor of 10 Ω is connected to a 12 V battery. What is the current flowing through the resistor?
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An electric heater of 500 W is used to heat water for 30 minutes. How much electrical energy is consumed?
An electric heater of 500 W is used to heat water for 30 minutes. How much electrical energy is consumed?
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What is the physical principle that states that the total momentum of a closed system remains constant over time, as long as there are no external forces acting on the system?
What is the physical principle that states that the total momentum of a closed system remains constant over time, as long as there are no external forces acting on the system?
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During a collision, what happens to the total momentum of the system if the collision is perfectly inelastic?
During a collision, what happens to the total momentum of the system if the collision is perfectly inelastic?
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In a collision between two objects, what determines the final velocity of the combined system after the collision?
In a collision between two objects, what determines the final velocity of the combined system after the collision?
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What is the key assumption that allows us to apply the principle of conservation of momentum to a system?
What is the key assumption that allows us to apply the principle of conservation of momentum to a system?
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In a real-world scenario, what might be an example of a situation where the principle of conservation of momentum is applied?
In a real-world scenario, what might be an example of a situation where the principle of conservation of momentum is applied?
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