3 years ago

The speed of an object increases by 30 m/s in 10 seconds. what is its acceleration?

Physics

1 answer:

Sladkaya [172]3 years ago

4 0

Hope this helps you

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Answer:

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3 years ago

A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4m/s. But 3 seco

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Answer:

6 m/s^2

Explanation:

The average acceleration of the car is given by:

$a=\frac{v-u}{t}$

where

v is the final speed

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For the car in this problem,

v = 22 m/s

u = 4 m/s

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Therefore, the acceleration of the car is

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Olympic skier Tina Maze skis down a steep slope that descends at an angle of 30∘ below the horizontal. The coefficient of slidin

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net force on Maze during his sliding downwards motion

$F = mgsin30 - \mu mg cos30$

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$F = mg(sin30 - 0.10cos30)$

now to find the acceleration we will have

$a = \frac{F}{m}$

$a = g(sin30 - 0.10cos30)$

$a = 9.81(0.5 - 0.10(0.866))$

$a = 4.1 m/s^2$

now to find the speed after 4 s is given by kinematics

$v_f - v_i = at$

here we know that

$v_i = 0$

$v_f - 0 = 4.1(4)$

$v_f = 16.22 m/s$

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Dimensions help understand how physical amounts are related to their dependence on basic or fundamental volumes, i.e. how the body's dimensions rely on mass, time, length and temperature.

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Which of the following would not be found on the electromagnetic spectrum?

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All wavelengths and frequencies of electromagnetic radiation ...
including visible light ... are features of the electromagnetic spectrum.

Sound waves have nothing to do with the electromagnetic spectrum.

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