Answer:
Since a 100-N force is being used to push the crate in one direction, and there is a total net force of 0, the force of friction acting on the crate must also be 100 N. This frictional force points in the direction opposite of the push.
Answer:
The maximum displacement ,A= 0.047 m
Explanation:
Given that
Mass, m = 45 g= 0.045 kg
spring constant ,K= 240 N/m
Initial velocity at equilibrium ,v= 3.5 m/s
Lets take the maximum displacement is A
As we know that when the mass reached at the extreme position then the velocity of the mass will become zero.
From energy conservation
Now by putting the values
A=0.047 m
The maximum displacement ,A= 0.047 m
I can't bear to make you handle anything that makes you so uncomfortable. Please ask your Science teacher to contact me directly for the answers.
The cost of running the lightbulb A for 30 days at 0.110 per KWh is 1.98
<h3>How to determine the energy </h3>
We'll beging by calculating the energy used by lightbulb A. This can be obtained as follow:
- Power (P) = 25 watts = 25 / 1000 = 0.025 KW
- Time (t) = 30 days = 30 × 24 = 720 h
- Energy (E) =?
E = Pt
E = 0.025 × 720
E = 18 KWh
<h3>How to determine the cost for running the bulb for 30 days</h3>
The cost of running the bulb for 30 days can be obtained as follow:
- Cost per KWh = 0.11
- Energy (E) = 18 KWh
- Cost =?
Cost = energy × Cost per KWh
Cost = 18 × 0.11
Cost = 1.98
Lean more about buying electrical energy:
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