Time:1:30hrs Test CLASS 9th (Motion)
Marks:40
Note:All question carries two marks each.
Q. 1. When
the passenger moving in a bus , the road side trees appear to be moving in------------------------- direction.
Q. 2. In
uniform motion the object covers equal
distance in …………..time.
Q. 3. Where
objects cover un equal distances in equal interval of time then the motion is
called -----------
Q. 4. An
object travels 16m in 4sec and another 16 m in 2 sec. what is the average speed
of the object-----------
Q. 5. If
we specify , its direction of motion along with its speed , the quantity that
specifies with the aspects is called-------------
Q. 6. Automobiles
are fitted with a device that show the distance travelled . such a device is
known ----------
Q. 7. The
velocity of an object can be -------------- (a) non uniform or variable (b)
uniform or variable
Q. 8. A
car accelerate uniformly from 18 km h-1 to 36 km h-1 in 5
sec . calculate the acceleration-------------
Q. 9. A
train starting from rest attain a velocity of 72 km h-1 in 5 minutes
.Assuming that the acceleration is uniform. Find the distance traveled by the
train for attaining this velocity
----------
Q.10. A jogger runs with a constant 2.2 m/s speed for 15 minutes. The
distance does she travel during that time is……………………..
Q.11 After 15 minutes, the jogger in problem 1 gets tired, and during the next 2 seconds, she reduces her speed to 1.8 m/s. The average acceleration during these 2 seconds is …...
Q.12 A tennis ball if initially it comes toward the player's racquet at 20 m/s, and it leaves in the opposite direction at 24 m/s? A high-speed camera indicates the time of impact of 4. sec. The acceleration of ball is ………………..
Q.11 After 15 minutes, the jogger in problem 1 gets tired, and during the next 2 seconds, she reduces her speed to 1.8 m/s. The average acceleration during these 2 seconds is …...
Q.12 A tennis ball if initially it comes toward the player's racquet at 20 m/s, and it leaves in the opposite direction at 24 m/s? A high-speed camera indicates the time of impact of 4. sec. The acceleration of ball is ………………..
Q.13 Physical quantity is denoted by the slope of velocity time graph is
……………….
Q.14 A 150 m long
train crosses a bridge that is 850 m long in 100 seconds. The total distance
travelled by the train is…………….
Q.15 In Q14 The
speed of the train is ……………..
Q.16 Is it possible
for a body to have its velocity & acceleration pointing in opposite
directions? If Yes, give an example. If No, give reason why it is not possible?
Plot the velocity-time graph in case the answer is Yes.
Q.17 Under what condition(s) is the magnitude of
average velocity of
an object equal to its average
speed?
Q.18 Is it possible
for a body to be in circular motion with constant velocity?
Give reason.
Q.19
Derive the expression for Displacement-Time equation by graphical method.
Q.20
Derive V2-U2=2aS by formula method.
No comments:
Post a Comment