3. A motorcycle has a kinetic energy of 412 J. What kinetic energy would the bicycle have if it had:
a. twice the mass and was moving at the same speed?
b. the same mass and was moving with twice the speed?
C. one-half the mass and was moving with twice the speed?
the same mass and was moving with one-half the speed?
colo
e. three times the mass and was moving with one-half the speed?
Answers
Answered by
44
Answer:
814 J, 1648 J, 814 J, 103 J & 309 J respectively
Explanation:
It's given that
- 412 = 0.5mv²
a)
E = 0.5(2m)v² = 2 × 412 J = 814 J
b)
E = 0.5m(2v)² = 4 × 412 J = 1648 J
c)
E = 0.5(m/2)(2v)² = 2 × 412 J = 814 J
d)
E = 0.5m(v/2)² = 1/4 × 412 J = 103 J
e)
E = 0.5(3m)(v/2)² = 3/4 × 412 J = 309 J
Answered by
4
814 J, 1648 J, 814 J, 103 J & 309 J respectively
Explanation:
It's given that
412 = 0.5mv²
a)
E = 0.5(2m)v² = 2 × 412 J = 814 J
b)
E = 0.5m(2v)² = 4 × 412 J = 1648 J
c)
E = 0.5(m/2)(2v)² = 2 × 412 J = 814 J
d)
E = 0.5m(v/2)² = 1/4 × 412 J = 103 J
e)
E = 0.5(3m)(v/2)² = 3/4 × 412 J = 309 J
Similar questions