Part A Suppose you lift a 23 k g box by a height of 1.0 m . How much work do you

Question

Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part C How long is the ramp?
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.


Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part C How long is the ramp?
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.

Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part C How long is the ramp?
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.
Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part C How long is the ramp?
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.
Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part C How long is the ramp?
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.
Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
Part A Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures.   W = 230   J  
  W = 230   J     W = 230   J  
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part B Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box straight up the slope at a constant speed?(Figure 1)
Part C How long is the ramp?
Part C How long is the ramp?
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.
Part D Use your force and distance results to calculate the work you do in pushing the box up the ramp.


  W = 230   J   Suppose you lift a 23kg box by a height of 1.0m . How much work do you do in lifting the box? Express your answer using two significant figures. Instead of lifting the box straight up, suppose you push it up a 1.0m -high ramp that makes a 30? degree angle with the horizontal, as shown in the figure. Being clever, you choose a ramp with no friction. How much force is required to push the box How long is the ramp? Use your force and distance results to calculate the work you do in pushing the box up the ramp.

Explanation / Answer

Work done = mgh = 23 * 10 * 1 = 230 J

Part B:

Force required = mgsinx = 23*10*sin30 = 115 N

Part C:

ramp = height/sin30 = 1/0.5 = 2m

Part D:

Force = 115 N

Distance = 2 m

Thus work = 115*2 = 230 J

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