1. TODAY: Importance of Megastructures-handout What is a force?
Types of forces
Worksheet

2. FORCES:
There are various types of forces that can apply to structures and objects in motion.
Can you think of any type of forces on such megastructures as;
Burj Khalifa
Hoover Dam
The World
Golden Gate Bridge

3. What are forces?
A force is an action that makes something or someone move.
3 Main Forces:
push
pull
twist

4. Forces can make things:
Speed up
Slow down
Change direction
Change shape

5. Push Click on the 2 pictures that show something being pushed. twist
pull
pull

6. Pull Click on the 2 pictures that show something being pulled. twist
push

7. Twist Click on the 2 pictures that show something being twisted. pull
push
push

8. When you open a door you twist the handle and pull or push the door.
Other Objects:
Some objects use more than 1 force to get them moving.
When you open a door you twist the handle and pull or push the door.
When you ride a bicycle you push on the pedals and pull on the handlebars.

9. The seed is being pushed into the ground.
See if you can identify which force or forces are being used in these photos.
The seed is being
pushed
into the ground.

10. The boy is
pushing
the dough with his hand.

11. the knob to turn on the oven.
The hand is
twisting
the knob to turn on the oven.

12. The door is being
pulled
open.

13. her friend in her wheelchair.
The little girl is
pushing
her friend in her wheelchair.

14. the old fashioned plough.
The horses are
pulling
the old fashioned plough.

15. The screwdriver
pushes
the screw into the wood.

16. Review: Did you get them right? push twist pull
Could you spot the different forces? Let’s have one more try. What forces can you see in these pictures
push
twist
pull
Did you get them right?