The total metabolic energy used by each to complete the course is determined as 656.91 J.
<h3>
Kinetic energy of Jessie and Jaime</h3>
The kinetic energy of Jessie and Jaime is calculated as follows;
K.E = ¹/₂mv²
where;
- m is mass of Jaime
- v is speed
15 km/h = 4.17 m/s
5 km/h = 1.39 m/s
K.E = ¹/₂(68)(4.17)² + ¹/₂(68)(1.39)²
K.E = 656.91 J
Thus, the total metabolic energy used by each to complete the course is determined as 656.91 J.
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Like a lot of other things, (gravity, sound, electrostatic force), brightness also decreases as the square of the distance.
When the source moves to a new position that's 4 times as far away, its apparent brightness becomes (1/4^2) its original value.
That's 1/16 .
Answer:
a) 20 seconds
b) 600 m
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration
a) Speeder acceleration is 0 as the speed is constant

Police car

The distance they travel will be equal

Time required by the police car to catch the speeder is 20 seconds
b) The distance traveled by the police car will be 1.5×20² = 600 m
The mass of the skydiver is 122.2 kg
Explanation:
We can solve the problem by using the concept of weight.
The weight of a body is the force of gravity acting on the body; near the Earth's surface, its magnitude is given by

where
m is the mass of the body
is the acceleration of gravity
In this problem, we know the weight of the skydiver:
W = 1198 N
So we can re-arrange the equation to find its mass:

Learn more about weight here:
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When the force of the opponent's punch is extended, with time, the effect of the blow or the force of the blow is reduced thereby reducing chances for a knockout punch from the opponent to the boxer.