Solution:
Mass of the bag of rice = 75 kg Work done = 4900 J Work done in lifting the bag of rice is stored in it as its potential energy. Therefore, Potential energy = mgh Height = 6.67..
Mass of the bag of rice = 75 kg Work done = 4900 J Work done in lifting the bag of rice is stored in it as its potential energy. Therefore, Potential energy = mgh Height = 6.67..Solution:
The work done in lifting coal is nothing but gravitational potential energy. Mass of coal = 10 5 kg Time = 1 hour = 60 x 60 s = 3600 s Power of the eng..
The work done in lifting coal is nothing but gravitational potential energy. Mass of coal = 10 5 kg Time = 1 hour = 60 x 60 s = 3600 s Power of the eng..Question 4
Question: Convert 1 km/h to m/s. Answer: i.e., ..
Question: Convert 1 km/h to m/s. Answer: i.e., ..Numericals
01. A man of mass 60 kg runs up a flight of 60 steps in 40 seconds. If each step is 20 cm high, calculate his power. Solution : Since the man runs up a flight of steps, the work done will be equal to the potential energy. Height = height of one step x number of ste..
01. A man of mass 60 kg runs up a flight of 60 steps in 40 seconds. If each step is 20 cm high, calculate his power. Solution : Since the man runs up a flight of steps, the work done will be equal to the potential energy. Height = height of one step x number of ste..Question 8
Question: How many gram atoms are present in 69 grams of sodium? Answer: The number of gram atoms present in 69 grams of sodium is ..
Question: How many gram atoms are present in 69 grams of sodium? Answer: The number of gram atoms present in 69 grams of sodium is ..Solution:
Mass (m) = 50 kg Momentum (p) = 225 kgm/s Velocity (v) = ? Velocity = 4.5 ..
Mass (m) = 50 kg Momentum (p) = 225 kgm/s Velocity (v) = ? Velocity = 4.5 ..Question 20
Question: Impulse = _________. 1. 2. 3. 4. Answer: ..
Question: Impulse = _________. 1. 2. 3. 4. Answer: ..Solution:
Force (F) = 225 N Acceleration (a) = 2.5 m/s 2 Force (F) = ma Mass of the body = 90..
Force (F) = 225 N Acceleration (a) = 2.5 m/s 2 Force (F) = ma Mass of the body = 90..Force of attraction when the distance between the bodies is increased three times:
Force of Attraction Between Two Bodies of Mass m Separated by a Distance 3d That is, when the distance is doubled, the force will be reduced to 1/4 t h of the original value of force and when the distance is increased three times, the force will be reduced to 1/9 t h of the original val..
Force of Attraction Between Two Bodies of Mass m Separated by a Distance 3d That is, when the distance is doubled, the force will be reduced to 1/4 t h of the original value of force and when the distance is increased three times, the force will be reduced to 1/9 t h of the original val..Gravitational Force Between Massive Objects
Let us now calculate the force of attraction between an object of mass 50 kg and Earth. The mass of the Earth is about 6 x 10 2 4 kg. The distance between the Earth and the object is approximately 64 x 10 5 m. The force of attraction between the object and the Ear..
Let us now calculate the force of attraction between an object of mass 50 kg and Earth. The mass of the Earth is about 6 x 10 2 4 kg. The distance between the Earth and the object is approximately 64 x 10 5 m. The force of attraction between the object and the Ear..See what our Users say :
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