AP1 Unit 2B Newton's 2nd Law

As the angle of the incline increases, what happens to the normal force?

• The normal force increases

• The normal force decreases

• The normal force is not affected by the incline

• The normal force is only dependent on the force due to gravity

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Which of the following is true about the system shown?

• The system is not accelerating.
• The tension between m₂ and m₁ is less than the tension between m₂ and m₃
• The acceleration of the system only depends on m₃
• None of the other answers are true

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Which of the following statements is true about the image above?

• The accelerations of the blocks will vary according to their mass

• The net force acting on each block is the same

• The blocks will experience the same acceleration

• The 3m box will eat the 2m and the m boxes

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Assuming both objects are at rest, which object is more massive? M1 or M2?

• M1 is more massive
• M2 is more massive
• both M1 and M2 are the same mass

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A car travels up a hill at constant speed. Which of the following diagrams best represents the forces acting on the car at this instant?

• 
• 
• 
• 

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Is it possible for the normal force to be equal to the gravitational force?

• Yes. If the surface is horizontal.

• Yes. If the surface is vertical

• No. FN will always be less than Fg

• No. Fg will be less than FN.

If the table is frictionless, what will be the tension in the string?

• 0 N

• 13.3 N

• 13.6 N

• 16 N

• Impossible to determine

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Assuming a frictionless, massless pulley, determine the acceleration of the blocks once they are released from rest.

• mg/(M+m)

• Mg/(M+m)

• Mg/m

• (M+m)g/(M-m)

• (M-m)g/(M+m)

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A 25 kg sign is suspended from three cables which are connected point D. These cables are cable AD, cable BD, and cable CD. What is the tension in cable BD (the horizontal cable)?

• 176.775 N

• 250 N

• 353.557 N

• 500 N

• 125 N

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NGSS.HS-PS2-1

Blocks A and B, of masses m and 2m, respectively, are connected by a light string and pulled across a surface of negligible friction with a constant force F₁, as shown above. The acceleration of the blocks is a. The force of the string pulling block B forward has magnitude F₂. Which of the following claims correctly describes the relationship between the magnitude of the forces acting on the blocks?

• F₁ is equal to F₂.

• F₁ is greater than F₂.

• F₂ is equal to 3ma.

• F₂ is greater than 3ma.

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