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Forces in Balance

Total questions: 22

Worksheet time: 11mins

Name
Class
Date
1.

A quantity with a magnitude and direction

a)

Scalar

b)

Vector

2.

A quantity with only magnitude.

a)

Scalar

b)

Vector

3.

When two objects interact they exert an equal and opposite force on each other is...

a)

Newton's First Law of Motion

b)

Newton's Second Law of Motion

c)

Newton's Third Law of Motion

4.

If the two forces acting on an object are balanced it will remain stationary or continue moving at a constant velocity is...

a)

Newton's First Law of Motion

b)

Newton's Second Law of Motion

c)

Newton's Third Law of Motion

5.

Name two quantities that are vectors.

a)

force and speed

b)

speed and acceleration

c)

force and velocity

d)

mass and weight

6.
What are balanced forces?
a)
forces of the same size, in opposite directions
b)
the same size in the same direction
c)
forces in opposite directions
d)
forces at right angles to each other
7.
What do we call the forwards force produced by an aeroplane's engine or propeller?
a)
thrust
b)
friction
c)
weight
d)
gravity
8.
What is the force that pulls us towards the Earth?
a)
gravity
b)
weight
c)
friction
d)
mass
9.

What is 'drag' another name for?

a)

upthrust

b)

air resistance

c)

friction

d)

weight

10.
What is the name for a single force on an object with the same effect as all the forces combined?
a)
big
b)
total
c)
resultant
d)
sum
11.
Two forces on an object are in the same direction. How do we calculate the resultant force?
a)
take away one from the other
b)
multiply them
c)
divide one by the other
d)
add them together
12.

Two forces on an object are in opposite directions. How do we calculate the resultant force?

a)

divide one by the other

b)

multiply them

c)

take one away from the other

d)

add them together

13.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
14.
The force that opposes the motion of two surfaces sliding past each other is called ___________.
a)
acceleration
b)
inertia
c)
friction
d)
unbalanced
15.
What is it called when the force of gravity is acting on an object?
a)
Weight
b)
Sliding Friction
c)
Momentum
d)
Projectile Motion
16.

Which of the following is a non contact force?

a)

weight

b)

air resistance

c)

friction

d)

tension

17.

Which of the following is a contact force?

a)

weight

b)

air resistance

c)

magnetic force

d)

electrostatic force

18.

How do you calculate the moment of a lever?

a)

force / distance from pivot

b)

force + distance from pivot

c)

force - distance from pivot

d)

force x distance from pivot

19.

How do you calculate the moment of a gear?

a)

force / radius of gear

b)

force + radius of gear

c)

force - radius of gear

d)

force x radius of gear

20.

What does it mean when an object is freely suspended?

a)

Object returns to its equilibrium position when the turning force is removed.

b)

Object falls when the turning force is removed.

c)

Object will not turn.

d)

Object will not stop turning.

21.

What does it mean when we say an object is in equilibrium?

a)

Object returns to its equilibrium position when the turning force is removed.

b)

Objects anticlockwise and clockwise moment are balanced.

c)

Object has been stopped by friction.

d)

Object will not stop turning.

22.

When you have two forces working at an angle to each other you can calculate the resultant force using a...

a)

parallelogram

b)

triangle

c)

square

d)

circle