questions on kinematics for iit jee

questions on kinematics for iit jee

Welcome,
To STUDYEVERTHING
Today, we are going to cover the MOST IMPORTANT QUESTION from PHYSICS chapter KINAMATICS for exams like CBSE board, NEET, JEE MAIN & JEE ADVANCE.

First try to solve the question on your own in the allotted time (45 minutes). Then check the answers.

If you want to know the answers in detail you can simply download the pdf file which is at the end of the session.

So, what are you waiting for,
Let's crack it.

You may choose the language using translater, located at top of the right-hand side, as Hindi, Gujarati, etc.

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STUDY EVERTHING

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TIMER:

45min

1. A vehicle covers first half distance between two points at a speed of 30km/hr and second at a speed of 20km/hr. The average speed (in km/hr) of the vehicle will be
a.30
b.25
c.24
d.20

2.A rocket works on the principle of conservation of
a.angular momentum
b.energy
c.mass
d.linear momentum

3. In system of units, the value of acceleration due to gravity is 1 and the unit of time is one second in this system. The length would be
a.1cm
b.98cm
c.980cm
d.(980)^1/2cm

4. A body has mass of 50kg. Its velocity is brought down from 20m/s to 5m/s by a resisting force in 5s. The magnitude of resisting force is.
a.50N
b.150N
c.750N
d.375N

5. A a particle of mass m moves in x-axis as follows: it starts from rest at t=0 at x=0 and comes to test at t=1 at point x=1. No other information is available about the motion of intermediate times . If α donates instantaneous acceleration of the particle then,
a.|α| cannot remain positive for all t in interval.
b.|α| cannot exceed 2 in any of its path.
c.|α| must be >4 in some point or points in its path
d.α must change its sign during the motion and but no other assertion can be made with the given information.

6. A car moving with 50km/hr can be stopped by brakes after atleast 6m. If same car is moving at 100km/hrs then minimum stopping distance is
a.12m
b..18m
c.24m
d.6m

7. A ball is thrown from a point with speed 'v' at an elevation angle θ. For the same point and same instant a person running with constant speed 'v/2' to catch the ball. Will person a ke to catch the ball? If yes, then what should be angle of projection θ ?
a.No
b.Yes,30°
c.Yes,60°
d.Yes,45°

8. Which of the following statement is False for a particle moving in the circle with the constant angular speed?
a.The acceleration vector points to the centre of the circle
b.The acceleration vector is tangent to the circle .
c.The velocity vector is tangent to the circle
d.Velocity and acceleration are perpendicular to each other

9.A point moves counter-clickwise direction on a circular path as shown in the figure. The movement of 'P' is such that it sweeps out a length of s=t³ +5, where s is in mere and t is in seconds. The radius of path is 20m. The acceleration of 'P' when t=2s nearly( in m/s²)

a.13
b.12
c.7.1
d.14

10.Two cars of mass m₁ and m₂ are moving in circle of radius r₁ and t₂, respectively. Their speeds are such that they make complete circle in same time t. The ratio of their centripetal acceleration is
a.m₁r₁: m₂ r₂
b. m₁: m₂
c. r₁: r₂
d.1: 1

NUMERICAL TYPE

1.A car accelerate by 50m/s². It would attain a speed of 100km/h from rest,in (seconds)

2. In 1s a particle moves from A point to B point, moving in semi-circle of radius of 1 m (see figure). The magnitude of average velocity (in m/s).

3. A particle starts from rest at t=0 the acceleration graph is shown in figure. The maximum velocity attain by the body will be

4. A particle is moving towards eastward with a velocity of 5m/s. In 10s the velocity changes to 5m/s northward. The average acceleration in this time is

5. A boy is playing on the roof of 10m high building throws a ball with 10m/s at an angle 30° with horizontal. How far from the throwing point will the ball be attained the hight of 10m from the ground? (g=10m/s²)

JEE ADVANCE

1. Two towers AB and CD situated at a distance of d apart as shown in figure.
AB is 20m high and CD is 30m high from the ground. An object ⁷

mass m is thrown from the top AB horizontally with the velocity of 10m/s towards CD. Simultaneously another object of 2m is thrown from the top of CD at a angle of 60° with horizontal towards AB with same mmagnitude of initial velocity as that of first object, the two object moves in same vertical plane, collide in mid-air and stick to each other.
Calculate the distance d between the tower

a.17.32
b.16.72
c.18.96
d.12.12

2. A train is moving along a straight line with constant acceleration 'a'. A boy standing in train throws a ball forward with a speed of 10m/s, at a angle 30° to the horizontal. The boy has to move forward by 1.15m inside the train to catch the ball back at initial height, the acceleration of train, in m/s² is
a.2
b.4
c.5.136
d.5

3. The displacement x of particle in one dimension under the action of constant force is related to the time t by the equation t=(x)²+ 3 ,where x is in metre and t is in seconds. Find the displacement of particle when its velocity zero
a.0
b.1
c.2
d.5

4. Consider a disc rotating in horizontal plane with a constant angular speed ω about its centre O. The disc has a shaded region in one side of the diameter and an unshaded region of other side as shown in figure. When the disc is in orientation as shown, two pebbles P and Q are simultaneously projected at an angle towards R. The velocity of projection is in y-z plane and is same for both pebbles with respect to disc. Assume that (1).they land back on the disc before the disc has completed 1/8 rotation, (2).their range is less then half of the disc radius, and ω remains constant throughout. Then,

a.P lands in shaded region and Q landed in unshaded region
b.P lands in unshaded region and Q lands in shaded region
c.Both P and Q land in unshaded region
d.Both P and Q land in shaded region

5. A particle starts sliding down in frictionless inclined plane. If S_n is the distance traveled by it from t=n-1 sec to t=n sec. The ratio of S_n/S_n+1 is
a.2n-1/2n+1
b.2n+1/2n
c.2n/2n+1
d.2n+1/2n-1

Download the detailed answer pdf of the most important questions from KINEMATICS
HERE.

Unit and measurements  most important  questions	click here
Kinamatic most important questions	click here
Law of motion most important questions	click here
Work, energy and power most important questions	click here
Nit cutoff	click here
Iiit cutoff	click here

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