A woman driving a 2000 kg car at 15 m/s fully applies the brakes 50. m from a stoplight. If the car stops 5.0 m before the light, what is the magnitude of the average force applied by the brakes? A. 4100 N B. 4500 N C. 5000 N D. 45000 N

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Chapter1: Units, Trigonometry. And Vectors
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41. A woman driving a 2000 kg car at 15 m/s fully applies the brakes 50. m from a stoplight. If the car stops 5.0 m before the light, what is the magnitude of the average force applied by the brakes?
A. 4100 N
B. 4500 N
C. 5000 N
D. 45000 N

**Question 41: Physics Problem on Force Calculation**

A woman driving a 2000 kg car at a speed of 15 m/s fully applies the brakes 50 meters from a stoplight. If the car stops 5 meters before the light, what is the magnitude of the average force applied by the brakes?

**Options:**

A. 4100 N  
B. 4500 N  
C. 5000 N  
D. 45000 N  

**Explanation:**

In this problem, we are asked to find the average force applied by the brakes to stop the car. The situation involves concepts of physics like mass, velocity, distance, and force. The scenario provides data such as the mass of the car (2000 kg), initial speed (15 m/s), and the stopping distances (45 m, from which the car begins stopping 50 m from the light but stops 5 m before it). Using formulas from kinematics and dynamics, particularly the work-energy principle or Newton's laws, one can determine the braking force.

**Question 42:**

A physics student applies a 21.6 N force downward at an angle of 57.2 degrees with the horizontal to displace a broom a distance of 0.25 m. Determine the work done to sweep up broken lab glass.

(Note: The explanation for this question would involve concepts of work, force, angle, and displacement, using the formula: Work = Force × Distance × cos(angle).)

No graphs or diagrams are present in the image.
Transcribed Image Text:**Question 41: Physics Problem on Force Calculation** A woman driving a 2000 kg car at a speed of 15 m/s fully applies the brakes 50 meters from a stoplight. If the car stops 5 meters before the light, what is the magnitude of the average force applied by the brakes? **Options:** A. 4100 N B. 4500 N C. 5000 N D. 45000 N **Explanation:** In this problem, we are asked to find the average force applied by the brakes to stop the car. The situation involves concepts of physics like mass, velocity, distance, and force. The scenario provides data such as the mass of the car (2000 kg), initial speed (15 m/s), and the stopping distances (45 m, from which the car begins stopping 50 m from the light but stops 5 m before it). Using formulas from kinematics and dynamics, particularly the work-energy principle or Newton's laws, one can determine the braking force. **Question 42:** A physics student applies a 21.6 N force downward at an angle of 57.2 degrees with the horizontal to displace a broom a distance of 0.25 m. Determine the work done to sweep up broken lab glass. (Note: The explanation for this question would involve concepts of work, force, angle, and displacement, using the formula: Work = Force × Distance × cos(angle).) No graphs or diagrams are present in the image.
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