The answer is D. Scientists often use models to show how something works
<h2>
25.32 N net force would give the same object an acceleration of 3.9 m/s²</h2>
Explanation:
We have
Force = Mass x Acceleration
A net force of 37 N gives an object an acceleration of 5.7 m/s²
F = ma
37 = m x 5.7
m = 6.49 kg
Now we need to find what net force would give the same object an acceleration of 3.9 m/s²
Force = Mass x Acceleration
Force = 6.49 x 3.9
Force = 25.32 N
25.32 N net force would give the same object an acceleration of 3.9 m/s²
In order to answer either of these, we need to know the energy content of coal ... like kwh (or joules or BTU) in each kilogram (or pound or ton) of coal.
Answer:
Meter
Explanation:
I'd say meters, cause it's the SI unit of length,
which is a Derived Quantity.
Answer:
W ≈ 5.9 × J
Hence, option (c) is correct.
Given:
mass of box = 6 kg
Displacement of box = 10 m
To find:
Work done by the force = ?
Formula used:
Work done is equal to change is potential energy,
W = m g h
Where, W = Work done
m = mass of the box
h = displacement by the force
Solution:
Work done is equal to change is potential energy,
W = m g h
Where, W = Work done
m = mass of the box
h = displacement by the force
W = 6 × 9.8 ×10
W = 588 Joule
Thus, W ≈ 5.9 × J
Hence, option (c) is correct.