Answer:
11.1 m/s
Explanation:
The Kinetic energy of an object can be calculated by using the formula :
[tex]\bf Kinetic \ energy = \dfrac{1}{2} mv^2 [/tex]
Where :
• m is mass of the object
• v is speed or velocity
We are given :
- Mass of the car = 1150 kg
- Kinetic energy = 7.08 E4 J = 7.08 × 10⁴ J
To solve for speed of the car, substitute the given values in above formula:
[tex]\sf 7.08 \times 10^4 = \dfrac{1}{2} 1150 \times v^2 [/tex]
[tex]\sf 71800 = 575 \times v^2 [/tex]
dividing both sides by 575
[tex]\sf v^2 = 124.86 [/tex]
squaring both sides
[tex]\sf v = 11.1 \ m/s [/tex]
- Hence, the speed of the car is 11.1 m/s
