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2 years ago

15

A hiker climbs a hill 400 m high. If he weighs 50 kg

2 answers:

Zarrin [17]2 years ago

5 0

Answer:

20 is Solvent this is the answer u divide them

user100 [1]2 years ago

3 0

The work done on an object is directly proportional to the force on the object, the displacement of the object, and the cosine of the angle between the force and the displacement:

W = Fd cos 0

Energy is the ability to do work.

Work is a scalar quantity, which is usually measured in newton-meters or joules.

Work is 0 when the force is perpendicular to an object's displacement or when the object isn’t displaced.

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2 years ago

3) A bird flies toward a tree limb at a 45-degree angle to the ground along a path that is 50 m long landing on the limb. Determ

marin [14]

Answer:

35 m

Explanation:

Given :

The distance of the path from the ground to the tree limb = 50 m

The angle between the path of flight of the bird towards the tree limb and the ground = 45 degrees

Therefore we can determine the height above which the bird perched above the ground by using the rules of the trigonometric ratios as;

We know that ,

$\sin 45^\circ =\frac{\text{perpendicular}}{\text{hypothenus}}$

$\sin 45^\circ =\frac{\text{BC}}{\text{AC}}$

$0.7 =\frac{\text{BC}}{\text{50}}$

$\text{BC }= 0.7 \times 50$

= 35

Therefore, the bird perched on the tree limb at a height of 35 m.

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Alchen [17]

Answer:

True

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