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Which of the two A and B has greater velocity in the following? Give reason for your reply.
Give an example of situation in which distance is equal to
displacement.
Give two examples of vector quantity.
Define average speed.
Give SI unit of angular velocity.
Give two uses of graphical representation of motion.
What is meant by uniform circular motion? Why do we need a force to keep a body moving uniformly along a circular path? Name this force.
Define uniformly accelerated motion and give one example of it.
Distinguish between scalar quantity and vector quantity. Give one example of each.
Derive first equation of motion by graphical method.
Give one example each of uniform and non uniform in our daily life.
An ant climbs up five stairs, each of width 20 cm and height 20 cm. Find the distance covered and displacement of ant.
A fan rotates at 100 rpm. Find its angular velocity and linear velocity if tip of its blades is 0.20 m away from the axis of rotation.
Plot the v-t graph for the following data and state the nature of motion the body:
A car accelerates from 6 ms–1 to 16 ms–1 in 10 sec. Calculate (a) the acceleration and (b) the distance covered by the car in that time.
A circular track has a circumference of 3140 m with AB as one of its diameter. A scooterist moves from A to B along the circular path with a uniform speed of 10 m/s. Find
(a) distance covered by the scooterist,
(b) displacement of the scooterist, and
(c) time taken by the scooterist in reaching
from A to B
Define acceleration and state its SI unit. For motion along a straight line, when do we consider the acceleration to be (i) positive (ii) negative? Give example of a body in uniform acceleration.
Find the total displacement of the body from the following graph:
Instruction: The table given below shows distance (in cm) travelled by the bodies A, B and C. Read this data carefully and answer the questions which follow.
Distance (in cm) covered by different bodies
1. Which of the bodies is moving with
(a) constant speed?
(b) constant acceleration?
2. Which of the bodies covers
(a) maximum distance in 3rd second?
(b) minimum distance in 3rd second?
3. Which of the bodies is moving with non-uniform acceleration?
An object is moving along a straight line with uniform acceleration. The following table gives the velocity of the object at various instants of time
Plot the graph.
From the graph.
(i) find the velocity of the object at the end of 2.5 seconds.
(ii) Calculate the acceleration.
(iii) Calculate the distance covered in the last 4 seconds.
Mehak was moving through the city roads towards her school by a car. She recorded the odometer reading of the car after every five minutes and plotted a graph for distance vs time. She then inferred about the type of motion and found average speed from the graph.
(a) Which qualities of Mehak are worth mentioning?
(b) What type of motion would she have inferred?
(c) How is average speed calculated from the graph?
