A 1100-kg car is coasting on a horizontal road with a speed of 19 m / s. After passing over an

step 1 In this video we are going to focus on the given information where a car of mass M that is equal

A 1100-kg car is coasting on a horizontal road with a speed...

A 1100-kg car is coasting on a horizontal road with a speed of $19 \mathrm{~m} / \mathrm{s}$. After passing over an unpaved, sandy stretch $32 \mathrm{~m}$ long, the car's speed has decreased to $12 \mathrm{~m} / \mathrm{s}$. (a) Was the net work done on the car positive, negative, or zero? Explain. (b) Find the magnitude of the average net force on the car in the sandy section of the road.

A 1100-kg car is coasting on a horizontal road with a speed of $19 \mathrm{~m} / \mathrm{s}$. After passing over an unpaved, sandy stretch $32 \mathrm{~m}$ long, the car's speed has decreased to $12 \mathrm{~m} / \mathrm{s}$. (a) Was the net work done on the car positive, negative, or zero? Explain.
(b) Find the magnitude of the average net force on the car in the sandy section of the road.

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Work-Energy Theorem

The work-energy theorem states that the net work done on an object is equal to the change in its kinetic energy. This concept establishes a relationship between the forces acting on an object, the displacement over which they act, and the resulting increase or decrease in the object's energy due to motion.

Kinetic Energy

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity. It quantifies how changes in speed directly affect the energy of an object, making it critical when analyzing problems involving acceleration or deceleration.

Average Net Force

Average net force is determined by the relationship between the work done on an object and the displacement through which the force is applied. Specifically, when the net work and the displacement are known, the magnitude of the average net force can be calculated by dividing the net work by the displacement, linking force to energy change over distance.

Transcript

Please give Ace some feedback