Mechanical Advantage : Science physics; Help pleaseee neeed Asap give you 20 points or more for the best answr?

Question by hannah babee: Mechanical Advantage : Science physics; Help pleaseee neeed Asap give you 20 points or more for the best answr?
im doing physics on mechanical advantage really need your help sooooooooo bad!

1. Calculate the mechanical advantage for your small gear wheel.
( you can do it on any of your type of wheels or a toy car)

2.Calculate the mechanical advantage of your medium size gear wheel.

3. Calculate the mechanical advantage of your large gear wheel.

4. Calculate the work done in pushing a car a distance of 10m. When moving slowly the car has a resisting friction force of 200N.
a..2J
b 20J
c. 200J
d. 2000J

5. If there were no resisting frictional force, which answer do you predict would be closest to the amount of work required to move a car 10 m?

a. 2j
b. 20j
c. 200j
d. 2000j

challenge:

6. An incline plane is used to lift a 100 kg barrel onto a drinks bar at a height of 1m. The plane is 5m long. How much force is required to roll the barrel up the plane?

Hints Draw a diagram of the situation. Calculate the force required to lift the barrel straight up without any plane. This info is found in lesson 3, weight force. Use the information in lesson 5 on inclined planes to calculate the mechanical advantage. Divide the force straight up by the mechanical advantage factor to find the force to roll up the plane.

a. 20N
b. 980N
c. 196N
d. 4900N

7. The baby weighs 15kg and the elephant weighs 3T. How many pulleys and ropes are required for the baby to lift the elephant?
a. 2000 ropes & pulleys
b. 200 ropes & pulleys
c. 20 ropes & pulleys
d. 1000 ropes & pulleys

8. strong meter rule is used as a lever and the fulcrum is placed under the 90cm mark. What mass would need to be placed on the long end of the lever to lift a 1kg mass on the short end?

a. 111g
b. 9kg
c. 1kg
d. 12g

( i know this is alot , if you give me a really good answer ill giev you like 20 points.)

please help really appreciated.:).

Best answer:

Answer by Cocia Ŵyn bac yp
G’day!!
You are unable to give 20 points even if you wanted to!

1,2 and 3 are impossible to do… I know nothing about your wheels but MA = Load/effort.

4) Work = force x distance moved = 200N x 10m = 2000J.

5) 2J… it’s like pushing it on ice.

6) Are you sure you mean ‘force’ not work?

100kg = 100 x 9.8N = 980N( that’s the force)

Work = 980N x 1m = 980J ( up against gravity)

7) Need a diagram of the pulley system

8) 90M = 1000 x 10

M = 10000/90

M = 111g

Add your own answer in the comments!