Question

Mrs. Waid drives her car up Route 8 at 80mph. If her car weighs 2500 lbs,

Answer 1

Answer:

It have 1.359 joule kinetic energy.

Explanation:

• Kinetic energy is defined as the energy of any object due to its state of motion.
• Mathematically kinetic energy can be calculated as:

                                    K.E = $\frac{1}{2}$$mv^{2}$ ...........................equation 1

        where,

           m= mass of object

           v= velocity of that moving object

• In the above problem;

                     mass= 2500 lbs = $5511.56$ kg.

                     velocity= 80mph= $\frac{80}{60*60}$ $m/s$ = $0.0222$ $m/s$.

• Substituting the values in equation 1, we get;

                                    K.E= $\frac{1}{2}$ * $5511.56$ * $0.0222^{2}$

                                   K.E= $1.359 joule.$