Multiple Choice QuestionWhat will be the kinetic energy of a ball if its mass is 0.145 kg and it travels at a velocity of 9 meters per second?A.4.9 joulesB.5.9 joulesC.6.9 joulesD.7.9 joules
Question
Multiple Choice QuestionWhat will be the kinetic energy of a ball if its mass is 0.145 kg and it travels at a velocity of 9 meters per second?A.4.9 joulesB.5.9 joulesC.6.9 joulesD.7.9 joules
Solution
The kinetic energy (KE) of an object can be calculated using the formula:
KE = 1/2 * m * v^2
where: m is the mass of the object, v is the velocity of the object.
Given: m = 0.145 kg, v = 9 m/s.
Substituting these values into the formula gives:
KE = 1/2 * 0.145 kg * (9 m/s)^2 = 0.0725 kg * 81 (m^2/s^2) = 5.8725 joules.
So, the kinetic energy of the ball is approximately 5.9 joules. Therefore, the correct answer is B. 5.9 joules.
Similar Questions
A ball of mass 8 kg is thrown up with a speed of 10 m/s. Find the kinetic energy of the ball at the time of throwing.
If the mass of a ball is 2 kg and its velocity is 5 m/s then its kinetic energy in SI units is? 25 10 5 2
The ball has a mass of 340 g and is 1.2 m off the ground.If it currently has 18 J of kinetic energy, what will be the total amount of kinetic energy stored in the ball the moment it hits the ground?Gravitational field strength on Earth is 10 N/kg.Ignore the effects of air resistance.Give your answer to 2 significant figures.You must include units in your answer.
A bird has a mass of 0.8 kg and flies at a speed of 11.2 m/s. How much kinetic energy does the bird have?A.100.3 JB.50.2 JC.77.2 JD.4.5 JSUBMITarrow_backPREVIOUS
A car with mass 450 kg has a kinetic energy of 16,256 J. What is the speed of the car?A.11.2 m/sB.1.2 m/sC.8.5 m/sD.5.9 m/s
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.