A rod is released at an angle 45° to the horizontal as shown. If its length is L, its angular acceleration about its foot at ground is initially

1. 3g2L

2. 3g2L

3. 3g22L

4. 6g2L

Subtopic:  Torque |
 57%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The moment of inertia of pulley is I and its radius is R. The string doesn't slips on the pulley, as system is released, the acceleration of the system is

(1) g3+ImR2

(2) g1+ImR2

(3) 3g1+ImR2

(4) 3g2+ImR2

Subtopic:  Torque |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In uniform circular motion

(1) Both the angular velocity and the angular momentum vary

(2) The angular velocity varies but the angular momentum remains constant

(3) Both the angular velocity and the angular momentum stay constant

(4) The angular momentum varies but the angular velocity remains constant

Subtopic:  Angular Momentum |
From NCERT
PMT - 1994
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A wheel is subjected to uniform angular acceleration about its axis. Initially, its angular velocity is zero. In the first 2 sec, it rotates through an angle θ1. In the next 2 seconds, it rotates through an additional angle θ2. The ratio of θ21 is: 

1. 1 2. 2
3. 3 4. 5
Subtopic:  Rotational Motion: Kinematics |
 61%
From NCERT
AIIMS - 1985
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A particle of mass m moving with velocity u makes an elastic one-dimensional collision with a stationary particle of mass m. They are in contact for a very short time T. Their force of interaction increases from zero to F0 linearly in time T/2 and decreases linearly to zero in further time T/2. The magnitude of F0 is:

(1) mu/T

(2) 2mu/T

(3) mu/2T

(4) None of these

Subtopic:  Linear Momentum |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A force of 50 dynes is acted on a body of mass 5 g which acts for an interval of 3 seconds, then impulse is 

(1) 0.15 × 10–3 N-s

(2) 0.98 × 10–3 N-s

(3) 1.5 × 10–3 N-s

(4) 2.5 × 10–3 N-s

Subtopic:  Linear Momentum |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A body of mass m slides down an incline and reaches the bottom with a velocity v. If the same mass were in the form of a ring which rolls down this incline, the velocity of the ring at bottom would have been

(1) v

(2)  2 v

(3) 1/2v

(4) 2/5v

Subtopic:  Rolling Motion (OLD NCERT) |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In an explosion a body breaks up into two pieces of unequal masses. In this 

(1) Both parts will have numerically equal momentum

(2) Lighter part will have more momentum

(3) Heavier part will have more momentum

(4) Both parts will have equal kinetic energy

Subtopic:  Linear Momentum |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Two bodies of masses m1 and m2 have equal kinetic energies. If p1 and p2 are their respective momentum, then ratio p1 : p2 is equal to 

(1) m1:m2

(2) m2:m1

(3) m1:m2

(4) m12:m22

Subtopic:  Linear Momentum |
 85%
From NCERT
PMT - 1985
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A light and a heavy body have equal momenta. Which one has greater K.E 

(1) The light body

(2) The heavy body

(3) The K.E. are equal

(4) Data is incomplete

Subtopic:  Linear Momentum |
 78%
From NCERT
PMT - 1985
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh