A body with a mass of 88 kg is moving at 13.89 m/s. What is its kinetic energy?

A body with a mass of 88 kg is moving at 13.89 m/s. What is its kinetic energy?

• A. 8,488 J
• B. 1.22 kJ
• C. 13.89 kJ
• D. 611.11 J

Answer: (A)

To find the kinetic energy of a body, you can use the kinetic energy formula, which is expressed as: \[ KE = \frac{1}{2} mv^2 \] where \( KE \) is the kinetic energy, \( m \) is the mass of the body, and \( v \) is its velocity. Given the mass of the body is 88 kg and the velocity is 13.89 m/s, you can substitute these values into the formula: 1. First, calculate \( v^2 \): \[ v^2 = (13.89\, \text{m/s})^2 = 193.5121\, \text{m}^2/\text{s}^2 \] 2. Next, multiply by the mass and divide by 2: \[ KE = \frac{1}{2} \times 88 \, \text{kg} \times 193.5121 \, \text{m}^2/\text{s}^2 \] \[ KE = 44 \times 193.5121 = 8524.57 \, \text{J} \] Upon rounding, this value is approximately 8,

To find the kinetic energy of a body, you can use the kinetic energy formula, which is expressed as:

[ KE = \frac{1}{2} mv^2 ]

where ( KE ) is the kinetic energy, ( m ) is the mass of the body, and ( v ) is its velocity.

Given the mass of the body is 88 kg and the velocity is 13.89 m/s, you can substitute these values into the formula:

1. First, calculate ( v^2 ):

[ v^2 = (13.89, \text{m/s})^2 = 193.5121, \text{m}^2/\text{s}^2 ]

2. Next, multiply by the mass and divide by 2:

[ KE = \frac{1}{2} \times 88 , \text{kg} \times 193.5121 , \text{m}^2/\text{s}^2 ]

[ KE = 44 \times 193.5121 = 8524.57 , \text{J} ]

Upon rounding, this value is approximately 8,