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PHYSICS, M2 EQ-Bank 4 MC

A 2 kg block is placed on a smooth inclined plane angled at 30 to the horizontal. Assume friction is negligible.

What is the most likely motion of the block?

  1. The block will move down the incline with a constant acceleration.
  2. The block will move down the incline with increasing acceleration.
  3. The block will remain at rest.
  4. The block will move down the incline at a constant speed.
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→ The block will experience a constant force down the slope which can be calculated using .

→ As the block is subject to a constant force, it will also experience a constant acceleration down the slope (Newton’s 2nd Law).

PHYSICS, M2 EQ-Bank 7

With reference to the diagram provided, determine the angle of inclination at which the system remains in static equilibrium.   (2 marks)

(Assume the inclined plane is frictionless)

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→ For the system to be in static equilibrium, the force of the 500 g block, , down the slope must be equal to the weight force of the 250 g block, .

 
 
 

 

→ The angle of inclination needs to be .

PHYSICS, M2 EQ-Bank 4

A 2 kg crate is being pushed up a rough incline that is angled at 30 to the horizontal. The frictional force acting between the crate and the surface is 10 N.

  1. On the diagram provided, draw and label all the forces acting on the crate as it is pushed up the incline.   (3 marks)
       

  1. Calculate the magnitude of the applied force required to accelerate the crate up the incline at 0.8 ms   (2 marks)
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a.    
     

b.   

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a.    
       

→ The frictional force acts down the slope in this scenario because frictional forces oppose the direction of motion.
 

b.    Weight force acting down slope

→ Total force down the slope    (weight force down slope + frictional force)

 
 
   

 
→ The force, , acting up slope needs to be .