A runner has a certain amount of kinetic energy. The runner now triples her speed. How...

Question

Question

A runner has a certain amount of kinetic energy. The runner now triples her speed. How much kinetic energy does the runner have now?

Answer 1

Answer #1

KEdv KE KE V

Answer 2

Similar Homework Help Questions

THERMOCHEMISTRY Understanding how kinetic energy scales with mass and speed Decide how the objects in the...

THERMOCHEMISTRY Understanding how kinetic energy scales with mass and speed Decide how the objects in the following table would be listed, if they were listed in order of increasing kinetic energy. That is, select '1 the lowest kinetic energy, select "2" next to the object with the second lowest kinetic energy, and so on. object kinetic energy A 58. kg runner moving at 11.5 m/s. (choose one) (choose one) A 52. kg runner moving at 10.2 m/s. A 58. kg...
A sprinter increases her speed such that her kinetic energy increased from 200J to 1000J, in...

A sprinter increases her speed such that her kinetic energy increased from 200J to 1000J, in a 5 second span. During this time, how much mechanical work was done? (Assume there was no change in potential energy) Group of answer choices 160 J 800 J 160 Watts 800 Watts
Consider a hybrid car that has 200 kJ of kinetic energy at a certain speed. The...

Consider a hybrid car that has 200 kJ of kinetic energy at a certain speed. The car's regenerative braking is 23% efficient (n = 0.23) at converting kinetic energy (Ek = 1/2mv) to energy stored in a battery. When the car slows down to half of its original speed, what is the energy, AE, added to the car's battery? kJ AE= (within three significant digits)

Kinetic Energy- KE-1 a) A 1,500kg car is traveling at 30.0m/s. How many joules of kinetic...

Kinetic Energy- KE-1 a) A 1,500kg car is traveling at 30.0m/s. How many joules of kinetic enorekye energy as the KE-2 a) Two objects with masses m -20.0 have? does the car b) Find the speed in km/hr for a 7.00kg bowling ball to have the same etic energy Find the ratio E/Ex g and my-60.0kg are both traveling with the same speed V. b) Two objects with identical masses m are traveling with speeds V1 20.0m's c) In part...
One runner has a mass of 40 kg, while another has a mass of 80 kg....

One runner has a mass of 40 kg, while another has a mass of 80 kg. The two runners have the same kinetic energy. Is one running faster than the other? If yes, which one, and by what factor is her speed greater?
Kinetic energy is the energy of motion. How much kinetic energy does a spherical asteroid with...

Kinetic energy is the energy of motion. How much kinetic energy does a spherical asteroid with a 1 km diameter have if it is made out of iron (has a density of about 8 kg m-3) and hits Earth at a relative velocity of 10 km s-1?

A certain moving electron has a kinetic energy of 1.01 × 10−19 J. A. ) Calculate...

A certain moving electron has a kinetic energy of 1.01 × 10−19 J. A. ) Calculate the speed necessary for the electron to have this energy. The mass of an electron is 9.109 × 10−31 kg. Answer in units of m/s. B.) Calculate the speed of a proton having a kinetic energy of 1.01 × 10−19 J and a mass of 1.673 × 10−27 kg. Answer in units of m/s.
4. Kinetic energy is the energy of motion. How much kinetic energy does a spherical asteroid...

4. Kinetic energy is the energy of motion. How much kinetic energy does a spherical asteroid with a 1 km diameter have if it is made out of iron (has density of about 8 kg m-3) and hits Earth at a relative velocity of 10 km s-1? Convert your answer to megatons of TNT (1 megaton of TNT = 4.18 x 1015 joules).
A long-distance runner has an average speed of 2 m/s during a race. How far does...

A long-distance runner has an average speed of 2 m/s during a race. How far does the runner travel in 25 min?

A car moving at 30 miles/hour has roughly 100,000 J of kinetic energy. You need to...

A car moving at 30 miles/hour has roughly 100,000 J of kinetic energy. You need to keep your foot on the gas to maintain your speed (assume a flat road). The gas you burn represents 500 J of chemical energy every second. (show work) a. After 5 minutes, how much energy have you generated by burning gasoline? b. How much kinetic energy does your car have at this time? c. If this number is not 100,000 J, explain why. If...