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2 years ago

Check attached image please.

Physics

1 answer:

gladu [14]2 years ago

4 0

Answer:

check the screen shot please

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A child holds onto a string attached to a toy boat and exerts a force of 7.5 N to pull the boat a distance of 9.2 m a long a str

soldi70 [24.7K]

The work that need to do is 66.24 J.

<h3>Explanation :</h3>

Hello guys, before we can count how much the work that needed to pull the toy, we should know how formula to count it first. Because the movement is with the angle, so the formula is :

$\boxed {\bold {W = F \times s \times \cos(\theta)}}$

If :

W = work (J)
F = force (N)
s = shift (m)
θ = elevation angle (°)

We know that :

x = the horizontal shift = 9,2 m
θ = elevation angle = 15°

W = work = ... J

$W = F \times s \times \cos(\theta) \\ W = 7.5 \times 9.2 \times \cos(15) \\ W = 69 \times 0.96 = 66.24 \: J$

So, the work that need to do is 66.24 J.

Subject : Physics 

Class : Junior High School/Senior High School 

Keyword : Work; Force; Shift; and Elevation Angle 

5 0

4 years ago

Paha777 [63]

Answer:

=140 cm²

Explanation:

____ ×20x 14

___ x base × height

is the formula have a gr8 day :)

5 0

3 years ago

Over a span of 6.0 seconds, a car changes it's speed from 89 km/h to 37 km/h. What is its average acceleration in meters per sec

scoundrel [369]

Acceleration = (change in speed) / (time for the change)

change in speed = (speed at the end) - (speed at the beginning)

change in speed = (37 km/hr) - (89 km/hr) = -52 km/hr

Acceleration = (-52 km/hr) / (6 sec)

Acceleration = (-26/3) km/(hr·sec)

Units: (1/hr·sec) · (hr/3600 sec) = 1 / 3600 sec²

(-26/3) km/(hr·sec) = (-26/3) km/(3600 sec²)

= -26,000/(3 · 3600) m/s²

Acceleration = -2.41 m/s²

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4 years ago

When you see a straw in a glass of water it looks bent why is this ?

yuradex [85]

Because light is being refracted

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3 years ago

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In contact forces, _____.

lbvjy [14]

Answer: B

Explanation:

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3 years ago

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