Solving a Physics Question: Wheel Mass 15kg, Radius 1m, Step 0.4m

[lionely]

I have no idea how to attempt this question, please help me. Anyone.

The question : The diagram shows a wheel whose mass is 15kg and radius 1m being pulled by a horizontal force F against a step 0.4m high. What inital force is just sufficient to turn the wheel so that it will rise over the step? What happens to the size of this horizontal force as the wheel rises?

This question is the last part of a long question, I did all the other parts. Can someone just break this down?

 

[Spinnor]

Does this get you started, did I make any mistakes?

 

[lionely]

Omg I knew IT! I should of made a triangle my father was trying to help me but he didn't listen!

 

[lionely]

I thank you so much, the .8m will be multiplied by the 150N

 

[asteriatic]

Sure, I can help you with this question. First, let's break down the information given to us. We have a wheel with a mass of 15kg and a radius of 1m. It is being pulled by a horizontal force F against a step that is 0.4m high. The question is asking us to find the initial force needed to turn the wheel so that it can rise over the step, and what happens to the size of this force as the wheel rises.

To solve this question, we need to use the principles of rotational motion and work. The initial force needed to turn the wheel can be calculated using the equation F = mgR, where m is the mass, g is the acceleration due to gravity (9.8m/s^2), and R is the radius. Plugging in the values given to us, we get F = (15kg)(9.8m/s^2)(1m) = 147N. This is the minimum force needed to overcome the weight of the wheel and lift it over the step.

As the wheel starts to rise, the force needed to keep it in motion will decrease. This is because as the wheel moves up the step, it gains potential energy and loses kinetic energy. This decrease in kinetic energy means that less force is needed to keep it in motion. However, the exact change in the size of the force will depend on the angle at which the wheel is pulled and the friction between the wheel and the ground.

I hope this helps to break down the question for you. Remember to always use the relevant equations and principles when solving physics questions. Good luck!