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WorksheetsLaws of Motion (9th )
Total questions: 15
Worksheet time: 7mins
1)Inertia depends on __________.
Weight
Velocity
Acceleration
Mass
2)What formula is used to calculate force?
Acceleration = Force x Mass
Force = Mass x Acceleration
Work = Force x Distance
Mass = Force + Acceleration
3)An object with a mass of 100 kg is observed to accelerate at the rate of 5 m/s2. Calculate the force required to produce this acceleration.
20N
500 N
20 kg
500kg
4) Forces that are equal in size but in opposite directions are called ______________ forces.
Strong
Balanced
Unbalanced
Net force
5) Which statement is true for Newton's second law
The force exerted on an object is not related to mass or acceleration
An object at rest wants to be in motion
More force is exerted to produce more acceleration
If there is more mass then there is more acceleration
6) Which of these is evidence that an unbalanced force is acting on an object?
The motion of the object is changing
The object remains at rest
The object continues moving in a straight line
The mass of the object is changing
7) According to Newton's third law of motion for every action there is ____
upward reaction
not equal and opposite reaction
equal but opposite reaction
equal and same reaction
8)A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
Newton's 1st Law
Newton's 2nd Law
Newton's 3rd Law
Newton's 4th Law
9) When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
The cannon moving forward
The cannon moving backward
The cannonball moving forward
The cannonball moving backward
10) The amount of matter in an object is...
gravity
weight
mass
momentum
11) Your mass is 40kg on Earth. On moon it will be_____
> 40kg
<40kg
= 40kg
massless
12)Which of the following is Newton's Law on Gravitation?
F=Gm1m2/r
F = Gm1m2/r2
F = m1m2/2r
F = Gm1m2/2r
13) Force of gravity is directly proportional to
Mass
Distance
Weight
Time
14) If I double the mass of one object, but don't change anything else... what happens to the gravitational force between two objects?
Doubles
Quadruples
4x Smaller
Cut in Half
15) If the force of gravity that object A of 60kg exerts on B of mass 10kg is 20N ,what is the force of gravity exerted by B on A
10N
60N
70N
20N
