Problem 1:
The ball has kinetic energy.
Given:
m = 2.1 kg
v = 30 m/s
Required:
KE
Equation:
[tex]KE = \dfrac{1}{2}mv^{2}[/tex]
Solution:
[tex]KE = \dfrac{1}{2}mv^{2}[/tex]
[tex]KE = \dfrac{1}{2}(\text{2.1 kg})(\text{30 m/s})^{2}[/tex]
[tex]\boxed{KE = \text{945 J}}[/tex]
Answer:
945 J
---------------------------------------------------------
Problem 2:
The bell has potential energy.
Given:
w = 190 N
h = 50 m
Required:
PE
Equation:
PE = wh
Solution:
PE = wh
PE = (190 N)(50 m)
[tex]\boxed{PE = \text{9,500 J}}[/tex]
Answer:
9,500 J
---------------------------------------------------------
Problem 3:
Given:
PE = 9,800 J
g = 9.8 m/s²
m = 56 kg
Required:
h
Equation:
[tex]h = \dfrac{PE}{mg}[/tex]
Solution:
[tex]h = \dfrac{PE}{mg}[/tex]
[tex]h = \dfrac{\text{9,800 J}}{(\text{56 kg})(\text{9.8 m/}\text{s}^{2})}[/tex]
[tex]\boxed{h = \text{17.86 m}}[/tex]
Answer:
17.86 m
---------------------------------------------------------
Problem 4:
The blender has potential energy.
Given:
w = 50 N
h = 5 m
Required:
PE
Equation:
PE = wh
Solution:
PE = wh
PE = (50 N)(5 m)
[tex]\boxed{PE = \text{250 J}}[/tex]
Answer:
250 J
[tex]\\[/tex]
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