Processing math: 100%
The angle between A=ˆi+ˆj and B=ˆi−ˆj is:
1. 45∘
2. 90∘
3. âˆ’45∘
4. 180∘
Subtopic:  Scalar Product |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

If a vector 2ˆi+3ˆj+8ˆk is perpendicular to the vector âˆ’4ˆi+4ˆj+αˆk, then the value of α will be:
1. âˆ’1
2. âˆ’12
3. 12 
4. 1

Subtopic:  Scalar Product |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A block of 1 kg is released from the top of a smooth curve AB, and then it encounters a rough surface BC, coming to rest at C. The work done by friction is:
(take g=10 m/s2)

1. 25 J 2. 50 J
3. −25 J 4. −50 J
Subtopic:  Work Energy Theorem |
 74%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

The work done by all the forces (external and internal) on a system equals the change in:
1. total energy
2. kinetic energy
3. potential energy
4. none of these

Subtopic:  Work Energy Theorem |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A bullet from a gun is fired on a rectangular wooden block with velocity u. When bullet travels 24 cm through the block along its length horizontally, velocity of bullet becomes u/3. Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is:
1. 30 cm 2. 27 cm
3. 24 cm 4. 28 cm
Subtopic:  Work Energy Theorem |
 69%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A body of mass 1 kg is thrown upwards with a velocity 20 ms-1. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction?
(Take g=10 ms-2)
1. 20 J
2. 30 J
3. 40 J
4. 10 J

Subtopic:  Work Energy Theorem |
 88%
From NCERT
AIPMT - 2009
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

A bicyclist comes to a skidding stop in 10 m. During this process, the force on the bicycle due to the road is 200 N is directly opposed to the motion. The work done by the cycle on the road is:
1. +2000 J
2. âˆ’200 J
3. zero
4. âˆ’20000 J

 
Subtopic:  Work done by constant force |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The work done by gravity on a projectile of mass m fired with a speed u at an angle θ to the horizontal, until the time of impact is:
          
1. zero 2. −12mu2cos2θ
3. −12mu2sin2θ 4. −12mu2
Subtopic:  Work done by constant force |
 61%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A force of 100 N acts on a block, always acting opposite to its velocity. The block moves from x=4 m to x=10 m and then to x=6 m. The work done by the force is:
1. 200 J 
2. âˆ’200 J 
3. 1000 J 
4. âˆ’1000 J 
Subtopic:  Work done by constant force |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

A body of mass 0.5 kg travels in a straight line with velocity v=ax3/2 where a=5 m−1/2s−1. The work done by the net force during its displacement from x=0 m to x=2 m is:
1. 15 J
2. 50 J
3. 10 J
4. 100 J

Subtopic:  Work Done by Variable Force |
 67%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch