11. An object has kinetic energy of 196 J. If its speed is 7 m/s, what...

Question

Question

science physics

Answer 1

Answer #1

kE = 0.5 mv^2

196 = 0.5* m * 7^2

m = 8kg

=========

Comment in case any doubt, will reply for sure.. Goodluck

Answer 2

Similar Homework Help Questions

An object has a kinetic energy of 284 J and a momentum of magnitude 23.5 kg · m/s. (a) Find the speed of the object....

An object has a kinetic energy of 284 J and a momentum of magnitude 23.5 kg · m/s. (a) Find the speed of the object. m/s (b) Find the mass of the object. kg
An object has a kinetic energy of 254 J and a momentum of magnitude 23.7 kg·m/s....

An object has a kinetic energy of 254 J and a momentum of magnitude 23.7 kg·m/s. Find the speed and the mass of the object. speed m/s mass kg
An 8.8 g bullet has a speed of 875 m/s. (a) What is its kinetic energy...

An 8.8 g bullet has a speed of 875 m/s. (a) What is its kinetic energy (in J)? 3850 | J (b) What is its kinetic energy (in J) if the speed is halved? J

An object has kinetic energy of 18j. If it's speed is 3m/s,what is its mass

An object has kinetic energy of 18j. If it's speed is 3m/s,what is its mass
a 1 kg object is moving at 10 m/s. to double its kinetic energy, its speed...

a 1 kg object is moving at 10 m/s. to double its kinetic energy, its speed should be increased to approximately (?) a. 20 m/s^2 b. 7 m/s c. 14 m/s
An object has a kinetic energy of 234 J and a momentum of magnitude 29.0 kg...

An object has a kinetic energy of 234 J and a momentum of magnitude 29.0 kg · m/s. (a) Find the speed of the object. ____m/s (b) Find the mass of the object. ____kg A rifle with a weight of 20 N fires a 5.3-g bullet with a speed of 260 m/s. (a) Find the recoil speed of the rifle. m/s (b) If a 675-N man holds the rifle firmly against his shoulder, find the recoil speed of the man...

An object of mass 0.9 kg has a speed of 4.2 m/s at position 1 and...

An object of mass 0.9 kg has a speed of 4.2 m/s at position 1 and a kinetic energy of 14.2 J at position 2. Calculate its kinetic energy at position 1, its speed at position 2, and the total work done on the object as it moves from position 1 to position 2. (a) its kinetic energy at position 1 _________J (b) its speed at position 2 __________m/s (c) the total work done on the object as it moves...
A 0.49-kg particle has a speed of 3.0 m/s at point A and kinetic energy of...

A 0.49-kg particle has a speed of 3.0 m/s at point A and kinetic energy of 7.7 J at point B. (a) What is its kinetic energy at A? J (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B? J
A 0.42-kg particle has a speed of 5.0 m/s at point A and kinetic energy of...

A 0.42-kg particle has a speed of 5.0 m/s at point A and kinetic energy of 8.5 J at point B. (a) What is its kinetic energy at A? J (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B? J

11. The kinetic energy of an 80-kg object moving at 10 m/s is 2000 J 4000...

11. The kinetic energy of an 80-kg object moving at 10 m/s is 2000 J 4000 J 6000 J 100 J 1000 J 12. The kilowatt-hour is a unit of speed power force momentum energy 13. Energy sources used today (in the U.S.) are, mostly, from: hydroelectric dams solar panels nuclear power stations geothermal sources fossil fuels 14. What is the velocity of a 30-kg box with a kinetic energy of 6,000 J? 64 m/s 6.0 m/s 18 m/s 20...