Two bodies of mass 10 kg and 5 kg moving in concentric orbits of radii R and r such that their periods are the same. Then the ratio between their centripetal acceleration is

(1) R/r

(2) r/R

(3) R2/r2

(4) r2/R2

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

A particle is moving in a horizontal circle with constant speed. It has constant

(1) Velocity

(2) Acceleration

(3) Kinetic energy

(4) Displacement

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

The angular speed of a fly wheel making 120 revolutions/minute is

(1) $2\pi \text{\hspace{0.17em}\hspace{0.17em}}rad/s$

(2) $4{\pi }^{2}\text{\hspace{0.17em}\hspace{0.17em}}rad/s$

(3) $\pi \text{\hspace{0.17em}\hspace{0.17em}}rad/s$

(4) $4\pi \text{\hspace{0.17em}\hspace{0.17em}}rad/s$

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

Certain neutron stars are believed to be rotating at about 1 rev/sec. If such a star has a radius of 20 km, the acceleration of an object on the equator of the star will be

(1) $20×{10}^{8}m/{\mathrm{sec}}^{2}$

(2) $8×{10}^{5}m/{\mathrm{sec}}^{2}$

(3) $120×{10}^{5}m/{\mathrm{sec}}^{2}$

(4) $4×{10}^{8}m/{\mathrm{sec}}^{2}$

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

An electric fan has blades of length 30 cm as measured from the axis of rotation. If the fan is rotating at 1200 r.p.m, the acceleration of a point on the tip of the blade is about

(1) 1600 m/sec2

(2) 4740 m/sec2

(3) 2370 m/sec2

(4) 5055 m/sec2

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

The angular speed of seconds needle in a mechanical watch is

(1) $\frac{\pi }{30}$ rad/s

(4) $\frac{60}{\pi }$ rad/s

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

What is the value of linear velocity, if $\stackrel{\to }{\omega }=3\stackrel{^}{i}-4\stackrel{^}{j}+\stackrel{^}{k}$ and $\stackrel{\to }{r}=5\stackrel{^}{i}-6\stackrel{^}{j}+6\stackrel{^}{k}$

(1) $6\stackrel{^}{i}+2\stackrel{^}{j}-3\stackrel{^}{k}$

(2) $-18\stackrel{^}{i}-13\stackrel{^}{j}+2\stackrel{^}{k}$

(3) $4\stackrel{^}{i}-13\stackrel{^}{j}+6\stackrel{^}{k}$

(4) $6\stackrel{^}{i}-2\stackrel{^}{j}+8\stackrel{^}{k}$

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

A particle moves with constant speed v along a circular path of radius r and completes the circle in time T. The acceleration of the particle is:

(1) $2\text{\hspace{0.17em}}\pi \text{\hspace{0.17em}}v/T$

(2) $2\text{\hspace{0.17em}}\pi \text{\hspace{0.17em}}r/T$

(3) $2\text{\hspace{0.17em}}\pi \text{\hspace{0.17em}}{r}^{2}/T$

(4) $2\text{\hspace{0.17em}}\pi \text{\hspace{0.17em}}{v}^{2}/T$

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

In 1.0 s, a particle goes from point A to point B, moving in a semicircle of radius 1.0 m (see figure). The magnitude of the average velocity is

(1) 3.14 m/s

(2) 2.0 m/s

(3) 1.0 m/s

(4) Zero

Subtopic:  Speed & Velocity |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level:

A stone ties to the end of a string 1m long is whirled in a horizontal circle with a constant speed. If the stone makes 22 revolution in 44 seconds, what is the magnitude and direction of acceleration of the stone

(1) $\frac{{\pi }^{2}}{4}m{s}^{-2}$and direction along the radius towards the centre

(2) ${\pi }^{2}m{s}^{-2}$ and direction along the radius away from the centre

(3) ${\pi }^{2}m{s}^{-2}$ and direction along the radius towards the centre

(4) ${\pi }^{2}m{s}^{-2}$ and direction along the tangent to the circle

Subtopic:  Circular Motion |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

Difficulty Level: