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On his way to class, a student on a skateboard is accelerating on a downhill stretch. Which of the following statements is true? (Select all that apply.)

A.The skateboarder's acceleration is perpendicular to the net force.
B.The skateboarder is moving in the direction of the net force.
C.The skateboarder's acceleration is in the direction of the net force.
D.The skateboarder is subjected to a net external force in the direction of motion.

Respuesta :

Answer:

B is correct

Explanation:

Because of gravity

onyebuchinnaji

The skateboarder's acceleration is in the direction of the net force.

The net force acting on the skateboard is given by Newton's second law of motion. The acceleration of the object occurs in the direction of the applied force.

∑F = ma

where;

  • m is the mass of the student and the skateboard
  • a is the acceleration of the student down the hill

The net force on the skateboard is parallel to the motion of the student;

F - mgsinθ = ma

where;

  • θ  is the angle of inclination of the hill
  • mg is the weight of the student and the skateboard

Thus, we can conclude that the skateboarder's acceleration is in the direction of the net force.

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