HARD
11th CBSE
IMPORTANT
Earn 100

A uniformly moving cricket ball is turned back by hitting it with a bat for a very short time interval. Show the variation of its acceleration with time. (Take acceleration in backward direction as positive).

Important Questions on Motion in a Straight Line

HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>VSA>Q 3.14
Give examples of a one-dimensional motion where the particle moving along positive x-direction comes to rest periodically and moves forward.
 
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>VSA>Q 3.14
Give examples of a one-dimensional motion wherethe particle moving along positive x -direction comes to rest periodically and moves backward.
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>VSA>Q 3.15
Give example of a motion where x>0, v<0 and a >0 at a particular instant.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>VSA>Q 3.16
An object falling through a fluid is observed to have acceleration given by a a=g-bv; where g= gravitational acceleration and b is a constant. After a long time of release, it is observed to fall with constant speed. What must be the value of constant speed?
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>SA>Q 3.19
A bird is tossing (flying to and fro) between two cars moving towards each other on a straight road. One car has a speed of 18 km/hr while the other has the speed of 27 km/hr. The bird starts moving from the first car towards the order and is moving with the speed of 36 km/hr and when the two cars were separated by 36 km. What is the total distance covered by the bird? What is the total displacement of the bird?
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>SA>Q 3.20
A man runs across the roof-top of a tall building and jumps horizontally with the hope of landing on the roof of the next building which is of a lower height than the first. If his speed is 9m/s, the (horizontal) distance between the two building is 10m and the height difference is 9m, will he be able to land on the next building? (take g=10m/s2)
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>SA>Q 3.21
A ball is dropped from a building of height 45 m. Simultaneously another ball is thrown up with a speed 40 m/s. Calculate the relative speed of the balls as a function of time.
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 3 - Motion in a Straight Line>LA>Q 3.24
A motor car moving at a speed of 72 km/h cannot come to stop in less than 3.0 s while for a truck this time interval is 5.0 s. On a highway, the car is behind the truck both moving 72 km/h. The truck gives a signal that it is going to stop at an emergency. At what distance the car should be from the truck so that it does not bump onto (collide with) the truck? Human response time is 0.5 s.