Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>EXERCISE>Q 41

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IMPORTANT

Earn 100

Centripetal acceleration of a particle revolving on a circular path of radius $R$ is $A .$ Its angular speed will be

50% studentsanswered this correctly

Important Questions on Motion in a Plane

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IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>EXERCISE>Q 42

A car is moving on a circular road of radius

r = 150 m

and its speed is increasing at a rate

8 m s^{- 2} .

At some instant its speed is

30 m s^{- 1},

net acceleration of the car at this instant is

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>EXERCISE>Q 43

When a particle moves at constant speed $v$ in a circle (or a circular arc) of radius $r,$ the acceleration of the particle is directed (i)_____ the centre of the circle and has a constant magnitude (ii)_____.

(i) towards / away from
(ii) $v^{2} r / \frac{v^{2}}{r} .$

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>EXERCISE>Q 44

An object moves in a circular path with a constant speed in the xy plane. With the centre at the origin. When the object is at

x = - 2 m,

its velocity is

- (4 m / s) \hat{j} .

Then objects velocity at

y = 2 m

is

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>EXERCISE>Q 45

An object moves in a circular path with a constant speed in the xy plane. With the centre of origin. When its velocity is

- (4 m / s) \hat{j}

.find objects acceleration when it is at

y = 2 m

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>Assignment>Q 4

Given that

0.4 \hat{i} + 0.8 \hat{j} + b \hat{k}

is unit vector. What is the value of

b ?

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>Assignment>Q 5

The position vector of particle changes from

10 m

east to

10 m

north in one second. What is the average velocity of the particle?

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>Assignment>Q 6

Two forces each numerically equal to $10$ dynes are acting as shown in the following figure, then the resultant is

Question Image

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Gamma Question Bank for Engineering Physics>Chapter 3 - Motion in a Plane>Assignment>Q 7

A person moves

30 m

North, then

20 m

east, then

30 \sqrt{2} m

south west, his displacement is