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Basim’s robotics team builds a robot that travels at 9 m/s and can fire a tennis ball at a target.

Which would result in a judge who is sitting beside the testing ground observing the tennis ball having a speed of 7 m/s?

The robot fires the ball forward with a speed of 7 m/s.
The robot fires the ball backward with a speed of 7 m/s.
The robot fires the ball backward with a speed of 2 m/s.
The robot fires the ball forward with a speed of 2 m/s.

Respuesta :

Answer:

C. The robot fires the ball backward with a speed of 2 m/s.

Explanation:

The robot fires the ball backward with a speed of 2 m/s.

To find the correct statement among all the options, we need to know about the relative velocity.

What is relative velocity?

Velocity is a relative physical quantity that depends on the chosen frame of reference.

What is the mathematical formulation of relative velocity?

  • Relative velocity=Vi-V'
  • Where Vi is the velocity in inertial frame and V' is velocity with respect to the moving frame.
  • Here, relative velocity=9 m/s and Vi = 7m/s
  • So, V'= Vi - relative velocity= 7m/s - 9 m/s = -2m/s

Thus, we can conclude that the robot fires the ball backward with a speed of 2 m/s.

Learn more about the relative velocity here:

brainly.com/question/17228388

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