Constrained Motion : General Approach
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- v
- vsinθ
- vsinθ
- vcosθ
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1083191/original_fish_.png)
- 4.5 ms−1
- 5.4 ms−1
- 3.0 ms−1
- 3.4 ms−1
- −3 J/kg
- −12 J/kg
- −5 J/kg
- None of these
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- v02, towards left
- v02, towards right
- 3v02, towards left
- 3v02, towards right
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- vB=vA, aB=0
- aB=0
- vB=35vA
- aB=16v2A125
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- 3F17m m/s2
- 2F17m m/s2
- 3F15m m/s2
- 3F12m m/s2
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- 1.8 m/s in downward direction
- 1.8 m/s in upward direction
- 0.6 m/s in downward direction
- 0.6 m/s in upward direction
In order to raise a mass of 100 kg, a man of mass 60 kg fastens a rope to it and passes the rope over a smooth pulley. He climbs the rope with acceleration 5 g4 relative to the rope. The tension in the rope is (take g = 10 ms−2)
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- 2a1+a2+a3=0
- a1+2a2+a3=0
- a1+a2+2a3=0
- −2a1+a2+a3=0
(Take g=10 m/s2)
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- 2 m/s2
- 1 m/s2
- 1.5 m/s2
- 2.5 m/s2
At a given instant, block A is moving with velocity of 5 m/s upwards. What is the velocity of block B at that time?
- 15 m/s (Downward)
- 15 m/s (Upward)
- 10 m/s (Downward)
- 10 m/s (Upward)
A car of mass 2000 kg is lifted up a distance of 30 m by a crane in 1 minute. A second crane does the same job in 2 minutes. Do the cranes consume the same or different amounts
of fuel? What is the power supplied by each crane? Neglect power dissipation against friction.
Take g = 10 ms–2.
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- (v1+v2)sin2θRcosθ
- (v1+v2)cos2θRsinθ
- (v1+v2)cotθRsinθ
- (v1+v2)tanθRcosθ
An aeroplane on a runway, starts from rest and picks up a velocity of 180 km/h and takes off. In doing so, it covers a runway of 1.5 km. Calculate the time in which it takes off?
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- 100 N
- 96 N
- 50 N
- 75 N
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- Acceleration of block A is 1 ms2
- Acceleration of block A is 2 ms2
- Tension in string connected to block B is 40 N
- Tension in string connected to block B is 80 N
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- −L2v2A(L2−y2)3/2
- −Lv2A(L2−y2)3/2
- −L2v2A(L−y)3
- −L2vA(L2−y2)3/2
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- 25 m/s
- 20 m/s
- 22 m/s
- 30 m/s
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- 3u4
- u2
- u4
- u
A car weighing .working against the resistance of accelerates from rest to in .The work done by the engine of the car is
The information is given insufficient
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- 1 m/s2 upwards
- 1 m/s2 downwards
- 2 m/s2 downwards
- 2 m/s2 upwards
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/927425/original_Picture_5.png)
- 20 m/s
- 5 m/s
- 10 m/s
- 15 m/s
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- 7 m/s2 upwards
- 2 m/s2 downwards
- 10 m/s2 downwards
- 8 m/s2 upwards
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/760322/original_S6_JEE_2020_25.png)
- 10 m/s
- 15 m/s
- 20 m/s
- 25 m/s
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- 2 m/s
- 10 m/s
- 6 m/s
- 8 m/s
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- a1= a2
- a1=6a2
- a1=3a2
- a1=4a2
A body of is moving with a velocity of . If a force of is applied on it for in the same direction as its velocity, what will now be the velocity of the body
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- 4vA+8vB−4vC+vD=0
- 4vA+8vB+4vC+vD=0
- 4vA−8vB+4vC−vD=0
- −4vA+8vB−4vC+vD=0
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/759675/original_S6_NEET_2020_9.png)
- 6 m/s
- 4 m/s
- 0 m/s
- None of these