Chapter 3
MOTION IN A STRAIGHT LINE
1. A car travel a distance, S on a straight road in two hours and then returns to the starting point in three hours .its average velocity is
a. S/5
b. 25/5
c. 0
2. A particle move with uniform velocity .which of the following statements about the motion of particles is true
a.its speed is zero
b.its acceleration is zero
C. Its acceleration is opposite to velocity
d. Its speed may be variable
3. If the displacement of particle is zero then its distance covered must be zero " state whether this statement is true or false
4. Acceleration due to gravity i independent of... ( massbof the earth,mass of the body)
5. A car and motorcycle moving in the same direction with velocities 15m/s and 20 m/s The motorcycle overtakes the car at certain instant. At what time thereafter will they be at 250 m apart?
6.A ball takes t1s to fall from a hight h1 and 2 t1s to fall from a hight h12
a.0.5
b.0.25
c.2
d.4
7.A body projected upwards reaches a maximum height, the velocity with which it was projected..................
8. A car starts accelerating uniformly from rest for sometime moves with a uniform velocity for sometime and come to rest with uniform retardation .Draw the velocity time graph of the car .
9. The position -time graph for two objects A and B are shown below
a. Which object is stationary?
b. Which object is in uniform motion?
c. Define uniform motion.
10. Given below are some examples of motion.
a. A railway carriage moving without jerks between two stations.
b. A monkey sitting on top of a man cycling smoothly on a circular path.
c. A spinning cricket ball that turns sharply on hitting the ground
d. A tumbling beaker that has slipped off the edge of a tae
I. In which of the above examples ,can the body be considered approximately a point object?
ii. What is the criteria for considering an object in motion as point object ?
iii. While considering the motion of planet around sun , can we approximate them as point objects ? State the reason
11.A car travel with a speed af 25m/s for 2 minutes and then with 20 m/s for 1 minute
a. Calculate the total distance travelled by the car
b. What is the average speed?
C.Define average speed
12. A ball is dropped from the top of a tower
a. Derive an expression for velocity of body after certain time in non- uniform motion
b prove that the height of the tower is 20 m if the ball reaches the ground with velocity 20m/s.
13. A car covers the first half of the distance between two places at a speed of 40 km /h
And the second half at 60 km/h . Calculate the average speed of the car
14. If the displacement of a particle is given by ,X= A+ Bt2
Find the velocity at t= 28. X= A+Bt2
15. The velocity- time graph of a body in the interval t=0 s to t= 65 is given below
i) suggest a method to calculate displacement using velocity-time graph
ii) Find displacement
Thank you
MOTION IN A STRAIGHT LINE
1. A car travel a distance, S on a straight road in two hours and then returns to the starting point in three hours .its average velocity is
a. S/5
b. 25/5
c. 0
2. A particle move with uniform velocity .which of the following statements about the motion of particles is true
a.its speed is zero
b.its acceleration is zero
C. Its acceleration is opposite to velocity
d. Its speed may be variable
3. If the displacement of particle is zero then its distance covered must be zero " state whether this statement is true or false
4. Acceleration due to gravity i independent of... ( massbof the earth,mass of the body)
5. A car and motorcycle moving in the same direction with velocities 15m/s and 20 m/s The motorcycle overtakes the car at certain instant. At what time thereafter will they be at 250 m apart?
6.A ball takes t1s to fall from a hight h1 and 2 t1s to fall from a hight h12
a.0.5
b.0.25
c.2
d.4
7.A body projected upwards reaches a maximum height, the velocity with which it was projected..................
8. A car starts accelerating uniformly from rest for sometime moves with a uniform velocity for sometime and come to rest with uniform retardation .Draw the velocity time graph of the car .
9. The position -time graph for two objects A and B are shown below
a. Which object is stationary?
b. Which object is in uniform motion?
c. Define uniform motion.
10. Given below are some examples of motion.
a. A railway carriage moving without jerks between two stations.
b. A monkey sitting on top of a man cycling smoothly on a circular path.
c. A spinning cricket ball that turns sharply on hitting the ground
d. A tumbling beaker that has slipped off the edge of a tae
I. In which of the above examples ,can the body be considered approximately a point object?
ii. What is the criteria for considering an object in motion as point object ?
iii. While considering the motion of planet around sun , can we approximate them as point objects ? State the reason
11.A car travel with a speed af 25m/s for 2 minutes and then with 20 m/s for 1 minute
a. Calculate the total distance travelled by the car
b. What is the average speed?
C.Define average speed
12. A ball is dropped from the top of a tower
a. Derive an expression for velocity of body after certain time in non- uniform motion
b prove that the height of the tower is 20 m if the ball reaches the ground with velocity 20m/s.
13. A car covers the first half of the distance between two places at a speed of 40 km /h
And the second half at 60 km/h . Calculate the average speed of the car
14. If the displacement of a particle is given by ,X= A+ Bt2
Find the velocity at t= 28. X= A+Bt2
15. The velocity- time graph of a body in the interval t=0 s to t= 65 is given below
i) suggest a method to calculate displacement using velocity-time graph
ii) Find displacement
Thank you
0 comments: