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WorksheetsForce Grade 9 (Session 2021-22)
Total questions: 20
Worksheet time: 16mins
Force is an ...........................
internal agent which change the state of body .
external agent which doesnot change the state of body .
external agent which change the state of body.
internal agent which doesnot change the position of body .
The SI unit of force is ..............
Kelvin
kilogram
metre
Newton
what is the relation between inertia and mass
inversely proportional
directly proportional
no relation
none of all
Everybody continues in its state of rest or uniform motion in a straight line unless it is acted upon by the external force”. is a Newtons law
first
second
third
none of all
No force is required for:
changing the direction of a specific moving cart
increasing the speed of the cart
decreasing the speed of the cart
moving the cart with same speed along the same direction
A force of 10N acts on a body of mass 20KG for 10 seconds. The change produced in momentum is given by:
5 KG m/s
100 KG m/s
200 KG m/s
2000 KG m/s
Different amount of forces are applied on four balls of different masses. The respective acceleration of each ball is given in the table. So, what is the maximum force applied on the ball?
1
2
3
4
A train passes over a 400 m long bridge. If the speed of the train is 30 m/s and the train takes 20 s to cross the bridge, then tell me the length of the train (your gift for correctly answering this question is a chocolate).
400 m
200 m
600 m
800 m
When an object is ....
What is the resultant force?
400 N Up
400 N Down
- 400 N Down
800 N Down
This is a velocity-time graph. What is the object doing in segment C?
Accelerating
Decelerating
Constant Velocity
Not moving
If an object mass =30 Kg on the Earth, what would be it's weight on Earth? Remember gravity on earth is 10 N/kg
30 N
300 kg
3000N
300 N
A ball is thrown downward from the top of a roof with a speed of 25m/s after 2s, its velocity will be down.
-5.4 m/s
-44. 6m/s
19.6m/s
44.6m/s
What is the value of the acceleration due to gravity near the surface of the Earth?
– 9.8 ft/s2
– 9.8 m/s2
9.8 m/s
32.2 ft/s
At the highest point of the trajectory of projectile, which quantity is zero?
acceleration
velocity
vertical component of velocity
horizontal component of velocity
Which between the feather and the metal bolt would hit the ground first if dropped from the same height in a vacuum?
the feather
they would be suspended in a vacuum gravity
the metal bolt
they would hit the ground at the same time
An object is thrown upwards with a speed of 14m/s. How high above the projection point does it reach?
5.0m
37.5 m
15 m
20m
A pingpong ball is dropped from a roof of 16m from the ground. How long does it take for the ball to reach the ground?
1.8 s
1.9 s
3.3 s
3.6 s
Who is the proponent of gravity?
Issaac Newton
Albert Einstein
Marie Curie
Prescot Joules
