

S2 Forces and Friction
Presentation
•
Science
•
2nd Grade
•
Practice Problem
•
Medium
+2
Standards-aligned
Carolyn Nisbet
Used 34+ times
FREE Resource
10 Slides • 10 Questions
1
S2 Forces and Friction

2
A force is a push or a pull
we cannot see forces but we can see their effects
3
A force can change an objects...
speed
direction
shape
4
A force can be measured using a force meter.
The unit of force is the Newton, N.
5
Multiple Choice
a force is a push or a pull
true
false
6
Multiple Choice
what is the unit for a force?
Kilogram
Newtons
Joules
7
Multiple Choice
we can see forces but not their effects
true
false
8
Multiple Choice
which of the following is NOT an effect of a force?
changed speed
changed mass
changed direction
changed shape
9
Friction
is the force that occurs when two objects rub together
10
11
Friction changes kinetic energy into heat energy.
When objects move through air or water they encounter frictional forces which reduce their motion. This is known as drag.
12
13
There are several ways to reduce friction:
reduce the contact between surfaces
reduce the force acting on an object
Make the surfaces smoother.
Lubrication is another way to make a surface smoother.
14
we could also make an object more streamlined
15
Multiple Choice
Who will experience more friction?
A
B
16
Multiple Choice
Where on a bike is friction helpful?
brakes
tyres
bike frame
17
Multiple Choice
The energy change during friction is...
Heat to kinetic
kinetic to heat
chemical to kinetic
kinetic to chemical
18
Multiple Choice
Who is wanting to decrease friction?
19
Multiple Choice
which of the following will increase friction...
reduce force on surface
reduce contact between surfaces
streamline the object
make the surface rougher
20
Multiple Choice
which car is more streamlined?
blue car
green car
S2 Forces and Friction

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