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WorksheetsScience-1
Total questions: 15
Worksheet time: 19mins
The orbit of a planet is an ellipse with the ____ at one of the foci.
Sun
Moon
Earth
Mars
If the mass of one object is doubled, the force between the two object also___
increases by 4
decreases by 4
doubles
none of these
Every object in the universe attracts every other object with a ____ force.
infinite
definite
gravitational
none of these
If the distance is doubled, the force decreases by a factor of ___.
2
4
6
8
The ___ force due to the earth on a body results in its acceleration.
gravitational
frictional
mechanical
magnetic
The radius of an earth is ____
6400 m
6400 cm
6400 kg
6400 km
Weight SI unit is ____ and its a ___ quantity.
N and Scalar
dyne and Scalar
N and Vector
dyne and Vector
Weight on moon =?, if weight of a person on earth is 84 N
15 N
14 N
16 N
12 N
For free fall the initial velocity=?
u=0
v=0
a=0
s=0
Unit of acceleration due to gravity is ___ .
m/s
cm/ s2
km/ s2
The motion of an object thrown upwards,acceleration is _____
negative
positive
neutral
positive and negative
A ball fall of a table an reaches a ground in two second assuming g=9.8 m/ s2 . Calculate it's speed on reaching the ground.
19.6 m/s
10 m/s
19 m/s
4.9 m/s
An object takes 3s to reaches the ground from a height of 18m planet. What is the value of g on that planet?
0.4m/ s2
4 m/ s2
8 m/ s2
0.8 m/ s2
An iron ball of mass 5kg is released from a height of 180m and falls freely to the ground. Assuming that the value of g is 10m/ s2 , calculate time taken by the to reaching the ground.
3s
4s
5s
6s
As we go above the surface of earth, weight will go on ____.
increasing
decreasing
constant
zero
