Look at the figure below and answer the following questions: Name the kind of motion of the stone.

The stone is moving with circular motion. Circular motion is the kind of motion in which the body travels in a circular path. If the body is undergoing uniform circular motion, then it will be an accelerated motion.

Look at the figure below and answer the following questions: Name the force that keeps the stone in its path.

Centripetal force keeps the stone in its path. The stone is moving with circular motion. Circular motion is the kind of motion in which the body travels in a circular path. If the body is undergoing uniform circular motion, then it will be an accelerated motion.

HARD

Earn 100

One end of a massless spring of constant 100N/m and natural length 0.5m is fixed and the other end is connected to a particle of mass 0.5kg lying on a frictionless horizontal table. The spring remains horizontal. If the mass is made to rotate at angular velocity of 2 rad/s, then elongation of spring is

50% studentsanswered this correctly

Important Questions on Gravitation

MEDIUM

Science>Physics>Gravitation>Circular Motion

Assertion (A): Two identical trains move in opposite senses in equatorial plane with same speeds relative to the earth's surface. They have equal magnitude of normal reaction.
Reason (R): The trains have different centripetal accelerations due to different speeds.

MEDIUM

Science>Physics>Gravitation>Circular Motion

A point mass

m

is moved in a vertical circle of the radius

r

with the help of a string. The velocity of the mass is

\sqrt{7 g r}

at the lowest point. The tension in the string at the lowest point is:

MEDIUM

Science>Physics>Gravitation>Circular Motion

A body of mass

10 kg

is attached to a wire of

0.3 m

length. The breaking stress is

4.8 \times 10^{7} N m^{- 2}

. The area of cross-section from the wire is

10^{- 6} m^{2}

. The maximum angular velocity with which it can be rotated in a horizontal circle is

EASY

Science>Physics>Gravitation>Circular Motion

What will be the minimum speed of the roller-coaster so that the passenger at the top, when becomes upside down, does not fall out? Consider the acceleration due to gravity as

10 m s^{- 2},

and the radius of curvature of the roller coaster is

10 m .

EASY

Science>Physics>Gravitation>Circular Motion

The quantity that remains constant in uniform circular motion is :

MEDIUM

Science>Physics>Gravitation>Circular Motion

A motor cyclist wants to drive in horizontal circles on the vertical inner surface of a large cylindrical wooden well of radius

8.0 m

, with minimum speed of

5 \sqrt{5} m s^{- 1}

. The minimum value of coefficient of friction between the tyres and the wall of the well must be

(g = 10 m s^{- 2})

EASY

Science>Physics>Gravitation>Circular Motion

A mass

m

is tied to one end of a spring and whirled in a horizontal circle with constant angular velocity. The elongation in the spring is

1 cm

. If the angular speed is doubled, the elongation in the spring is

6 cm

. The original length of the spring is

EASY

Science>Physics>Gravitation>Circular Motion

500 kg

car takes a round turn of radius

50 m

with a velocity of

36 kmph

. The centripetal force acting on the car is

MEDIUM

Science>Physics>Gravitation>Circular Motion

A mass attached to one end of a string crosses topmost point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be (

g =

gravitational acceleration)

MEDIUM

Science>Physics>Gravitation>Circular Motion

What is an artificial satellite? Name any two types of artificial satellite and state their functions.

EASY

Science>Physics>Gravitation>Circular Motion

A toy car of mass

80 g

is maintained to move in a horizontal circle of radius

0.8 m

with a velocity

v m s^{- 1}

. If the centripetal force acting on it is

10 N

, then the value of

v

m s^{- 1}

EASY

Science>Physics>Gravitation>Circular Motion

In Circular motion which one is correct

MEDIUM

Science>Physics>Gravitation>Circular Motion

A small block of mass $100 g$ is tied to a spring of spring constant $7.5 N m^{- 1}$ and length $20 cm .$ The other end of spring is fixed at a particular point $A .$ If the block moves in a circular path on a smooth horizontal surface with constant angular velocity $5 rad s^{- 1}$ about point $A,$ then tension in the spring is

EASY

Science>Physics>Gravitation>Circular Motion

Two stones of masses $m$ and $2 m$ are whirled in horizontal circles, the heavier one in radius $\frac{r}{2}$ and the lighter one in radius $r$ . The tangential speed of lighter stone is $n$ times that of the tangential speed of the heavier stone. They are reported to experience the same centripetal force. The value of $n$ is,