Earth as Inertial Frame
Trending Questions
The mass of a lift is . What will be the tension in its cable if it moves down with an acceleration ?
Mass of wedge as shown in figure is M and that of the block is m. Neglecting friction at all the places and mass of the pulley, calculate acceleration of the wedge. Thread is inextensible.
mgsinθM+m(1−cosθ)
mgsinθM+2m(1−cosθ)
M+m(1−cosθ)gmsinθ
mg sinθ
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5m/s2, the reading of the spring balance will be:
- 74 N
15 N
- 49 N
- 24 N
- Thread unwinds, spool rotates anticlockwise and friction acts leftwards.
- Thread winds, spool rotates clockwise and friction acts leftwards.
- Thread winds, spool moves to the right and friction acts rightwards.
- Thread winds, spool moves to the right and friction does not come into existence.
What are pseudo forces? Explain using diagrams
A table with smooth horizontal surface is placed in a cabin which moves in a circle of a large radius R with ω. A smooth pulley of small radius is fastened to the table. Two masses m and 2m placed on the table are connected through a string going over the pulley. Initially the masses are held by a person with the strings along the outward radius and then the system is released from rest (with respect to the cabin). Find the magnitude of the initial acceleration of the masses as seen from the cabin.
R
3R
A person stands on a spring balance at the equator. If the speed of earth's rotation increased by such an amount that the balance reading is half the true weight, what will be the length of the day in this case(approximately)?
12 hr
2 hr
4 hr
1 hr
- The balloon will move backward
- The ballon can move in any direction
- The balloon will move forward
- The balloon will be at the same position
- 1. 6 kg
- Less than 6 kg
- More than 6 kg
- May be more or less than 6kg
A body hangs from a spring balance supported from the from the ceiling of an elevator. If the elevator has an upward acceleration of 2.5m/s2 and the balance reads 50N, what is the true weight of the body?
(i) - p; (ii) - q; (iii) - r
- 8600 N
- 9680 N
- 11000 N
- 1200 N
- 5 N
- 25 N
- 50 N
- 75 N
- 7200 N
- 5880 N
- 4680 N
- Zero N
A table with smooth horizontal surface is placed in a cabin which moves in a circle of a large radius R with ω. A smooth pulley of small radius is fastened to the table. Two masses m and 2m placed on the table are connected through a string going over the pulley. Initially the masses are held by a person with the strings along the outward radius and then the system is released from rest (with respect to the cabin). Find the magnitude of the initial acceleration of the masses as seen from the cabin.
ω2R
3ω2R
ω2R3
ω2R
- The balloon will move forward
- The balloon will move backward
- The ballon can move in any direction
- The balloon will be at the same position
- 8600 N
- 9680 N
- 11000 N
- 1200 N
- Equal to one
- Less then one
- more than one
- Equal to two
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5m/s2, the reading of the spring balance will be:
- 49 N
- 24 N
- 74 N
- 15 N
- The balloon will move forward
- The balloon will move backward
- The balloon will be at the same position
- The ballon can move in any direction
- 1600N
- 2000N
- 3000N
- 1500N
- 3m
- 4m
- 10m
- 16m
- 24 N
- 15 N
- 49 N
- 74 N
If the cat has velocity v0=0m/s at height y0=2.0m at t=0sec, when will the cat-owner system have a center-of-mass height of yCM=0.01m?
- Never
- t=0.0sec
- t=0.42sec
- t=0.64sec
- t=0.59sec
- WB=WS
- WB=W′B
- W′B=W′S
- W′S=WS
- The spring balance reads the weight of man as 60kg
- The spring balance reading fluctuates between 60 kg. and 70 kg
- The spring balance reading fluctuates between 50 kg and 60 kg
- The spring balance reading fluctuates between 50 kg and 70 kg
(Take g=10 m/s2)
- 0.5 m
- 0.4 m
- 0.2 m
- 0.3 m