Font size
WorksheetsForce and Pressure– 2
Total questions: 44
Worksheet time: 1hrs 24mins
Why does the balloon get inflated?
Air exerts pressure on the inner walls of balloon causes it to expand and get inflated.
Because Helium is lighter than hydrogen
Inflation is a characteristic feature of a balloon
None of these
Explain why, a wide steel belt is provided over the wheels of an army tank.
The wide belts increase the area and reduce the pressure. This avoids sinking of the tank into the ground.
It creates a war-like effect
It helps to carry the load of the tank
Steel belt helps to flatten the ground below
What is pressure?
The amount of force exerted on a surface
The surface area of an object
The weight of an object
What is the equation used to calculate pressure?
pressure= force/mass
pressure =mass/volume
pressure=area/force
pressure=force/area
How do you Calculate Pressure
Force (N) /Area (m2)
Force (kg) /Area (mi2)
Area (m2) /Force (N)
Why does a rolling ball stop?
Gravity
Friction
Waterfalls
Sand
Watch the green man. Which force(s) are acting in this situation?
Frictional Force only.
Gravitational Force only.
Muscular Force only.
Muscular and Gravitational Force.
Q6. A horse pulling a cart is a
frictional force
muscular force
gravitational force
What is described as a change in its state of motion?
If the force applied on the object is in the direction of its motion, the speed of the object increases.
If the force applied on the object is in the direction of its motion, and its direction changes.
A change in either the speed of an object, or its direction of motion, or both, is described as a change in its state of motion.
A contact force is from
objects physically touching
far apart objects
not touching object
always a pull
A non-contact force is between
two objects that aren't touching
two objects that are touching
the ground and wheels
you and me
The three examples pictured are of
Non-contact Forces
Contact Forces
The force between the phone and the mount is a
contact force
non-contact force
The force between the two people through the rope is
Contact Pull
Non-contact Pull
Contact Push
Non-contact Push
Gravity is a
Contact Force
Myth
Non-contact Force
Which is an example of a non-contact force?
elastic force
normal force
applied force
electric force
Air Resistance Force
Contact Force
Non-Contact Force
Magnetic Force is an example of ____________ force.
contact
non-contact
balanced
unbalanced
Why do the shape and size of balloon change when filled with air or water?
Because Air is a non contact force
The high pressure produced by the gas or water molecules on the walls of balloon causes it to expand and get inflated.
because the atmospheric pressure acting on our body of the balloon
the shape and size of the balloon does not change
Why water comes out more slowly from an upstairs tap than from a similar tap downstairs?
This is so because the water pressure is less in the upstairs tap due to lesser depth.
because water finds its own level
As the depth of water increases, the pressure also increases.
none of these
We do not get crushed because of the atmospheric pressure acting on our body from outside
because it is balanced by the blood pressure acting from inside.
because the atmospheric pressure is not enough
Blood pressure is a balanced force
none of these
A knife does a better job of cutting or slicing food when it is sharp?
True
False
Why is it easier to cut something with a sharp knife than with a blunt one?
The area of the knife edge is large so pressure is greater.
The area of the knife edge is small so pressure is greater.
The area of the knife edge is large so pressure is smaller.
The area of the knife edge is small so pressure is smaller.
Pressure rxerted by air on the earth's surface
Pressure
Atmospheric pressure
Heat pressure
Some contact forces are
Frictional force
Push
Tensional Force
Gravity
Muscular force
Name the type of force
Force of gravity
Frictional force
Tensional force
Magnetic force
Muscular force
Where is friction less
Choose the correct force of this activity
muscular force
friction force
gravity force
magnetic force
When a blacksmith hammers a hot piece of iron, he uses his_________
electrostatic force
gravitational force
muscular force
contact force
You are pulled to the surface of the earth due to the force of _________________
gravity
friction
normal force
contact force
Which is an example of a non-contact force?
elastic force
normal force
applied force
electric force
A non-contact force is between
two objects that aren't touching
two objects that are touching
the ground and wheels
you and me
The three examples pictured are of
Non-contact Forces
Contact Forces
The force between the phone and the mount is a
contact force
non-contact force
The force between the two people through the rope is
Contact Pull
Non-contact Pull
Contact Push
Non-contact Push
Gravity is a
Contact Force
Myth
Non-contact Force
Friction is a
Contact Force
Myth
Non-contact Force
A contact force is from
objects physically touching
far apart objects
not touching object
always a pull
Air Resistance Force
Contact Force
Non-Contact Force
