If you meant "kinetics" then kinetics is the study of body movement.
Answer:
K.E = 248 J
Explanation:
Since the child is travelling at a given velocity. The kinetic energy of the child down the hill can be given by the following formula:
where,
m = mass of the child = 31 kg
v = velocity of the child = 4 m/s
Therefore,
<u>K.E = 248 J</u>
You don't have to set it up. It's already set up. You only have to identify the correct set-up from the four choices.
The correct one is 'B', and it's a formula that you really should memorize.
You'll be using it in any science class that you take.
Weight of an object = (the object's mass) x (the local acceleration of gravity) .
W = m x g
The object's mass never changes. But its weight does, whenever
it goes to places where the acceleration of gravity is different.
That's why the same astronaut has different weights on Earth
and on the moon.
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Also, by the way, that bit about the "pendulum bob" in this question
may be there mainly to distract and confuse you. Everything I said
up there above the line is true for ANY object ... a pendulum bob,
a gold fish, a newborn baby, a turtle, a tree, a school-bus, a rock,
a house, a jug of milk, a book, a computer, a burrito, a puppy,
a snowball, an airplane, a cigar, or anything else.
Weight anyplace = (mass) x (gravity in that place)
Answer:
D. injuries associated with lifting loads
Explanation:
The retail industry or store is the industry that involves the handling of their goods directly from the manufacturer and delivers goods to the consumer.
<em>The health risk is acculipble to workers in the retail sector is injuries associated with lifting loads because while manually handling heavy or awkward sized objects, which are common in the retail industry causes strains and sprains. </em>
So, the common activity in the retail store is lifting loads which leads to common injuries such as strains and sprains.
Hence, the correct answer is "D. injuries associated with lifting loads".