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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?
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?
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?
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?
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?
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?
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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