Answer:
1. 896, 000 J
2. 1,837.5 J
Explanation:
1.
Given: 40m/s and 1120kg
Required: What is the kinetic energy of a car that is travelling at a speed of 40m/s and has a mass of 1120 kg?
Equation: KE=½ mv²
Solution:
m= 1120kg
v= 40m/s
KE=½ mv²
=½ (1120kg)(40m/s)²
=(560kg)(1,600m²/s²)
=896, 000 J
Answer: 896, 000 J
2.
Given: 3kg and 35m/s
Required: What is the kinetic energy of a volleyball when it is served with a mass of 3kg and a speed of 35m/s?
m= 3kg
v= 35m/s
=½ (3kg)(35m/s)²
=(1.5kg)(1,225m²/s²)
= 1,837.5 kg m²/s² or 1,837.5 J
Answer: 1,837.5 J
Hope this helps :))
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Answers & Comments
Answer:
1. 896, 000 J
2. 1,837.5 J
Explanation:
1.
Given: 40m/s and 1120kg
Required: What is the kinetic energy of a car that is travelling at a speed of 40m/s and has a mass of 1120 kg?
Equation: KE=½ mv²
Solution:
m= 1120kg
v= 40m/s
KE=½ mv²
=½ (1120kg)(40m/s)²
=(560kg)(1,600m²/s²)
=896, 000 J
Answer: 896, 000 J
2.
Given: 3kg and 35m/s
Required: What is the kinetic energy of a volleyball when it is served with a mass of 3kg and a speed of 35m/s?
Equation: KE=½ mv²
Solution:
m= 3kg
v= 35m/s
KE=½ mv²
=½ (3kg)(35m/s)²
=(1.5kg)(1,225m²/s²)
= 1,837.5 kg m²/s² or 1,837.5 J
Answer: 1,837.5 J
Hope this helps :))