Review (again) Simple Machine

A force that moves an object is called as ....

• Work

• Force

• Simple machine

• Weight

How much work do we need to move 300 N object for 3 m?

• 100 N

• 100 J

• 900 N

• 900 J

Which is an example tools that using inclined plane principle?

• a flagpole

• a bottle opener

• an axe

• stapler

Mechanical advantage of the pulley is

• 1

• 2

• 3

• 4

What is the mechanical advantage of wheel and axle with radius 50 cm and 5 cm

• 10

• 25

• 50

• 250

If you push a box 500 cm doing 1000 J of work, how much force do you use?

• 2 N

• 200 N

• 5000 N

• 500000 N

5 m board is leaned against a wall to form an inclined plane. What is the height of the wall if the mechanical advantage of the inclined plane is 2?

• 2 m

• 2,5 m

• 10 m

• 12,5 m

Based on the picture what is the length of effort arm if the length of load arm is 20 cm?

• 10 cm

• 20 cm

• 30 cm

• 40 cm

What is the simple machine that we use to load a truck with boxes

• pulley

• lever

• wheel and axle

• inclined plane

How much load can be moved by wheel and axle (radius of each are 30 cm and 10 cm) with 20 N force?

• 9 N

• 300 N

• 60 N

• 600 N