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SSSSS [86.1K]
3 years ago
9

A stationary object has no forces acting on it. True False

Physics
2 answers:
riadik2000 [5.3K]3 years ago
8 0
True i took the test                  
Ierofanga [76]3 years ago
3 0
I think its true cuz the object isnt moving its just in one place there for no force would have to be put onto it unless its a nail
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Which electromagnetic waves have the shortest wavelengths and highest frequencies?
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a basketball player can leap upward .65m how long does the basketball player remain in the air use 9.81m/s²​
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At the player's maximum height, their velocity is 0. Recall that

{v_f}^2-{v_i}^2=2a\Delta y

which tells us the player's initial velocity v_i is

0^2-{v_i}^2=-2g(0.65\,\mathrm m)\implies v_i=3.6\dfrac{\rm m}{\rm s}

The player's height at time t is given by

y=v_it-\dfrac g2t^2

so we find their airtime to be

0.65\,\mathrm m=\left(3.6\dfrac{\rm m}{\rm s}\right)t-\dfrac g2t^2\implies t=0.36\,\mathrm s

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3 years ago
An object increases its velocity from 22 m/s to 36 m/s in 5.0 s. What is the average velocity of the object?
Luden [163]

Answer:

a=2.8\ m/s^2

Explanation:

Given that,

Initial velocity of an object, u = 22 m/s

Final velocity of an object, v = 36 m/s

Time, t = 5 s

It can be assumed to find the average acceleration of the object instead of average velocity.

The change in velocity per unit time is equal to average acceleration of an object. It can be given by :

a=\dfrac{v-u}{t}\\\\a=\dfrac{36\ m/s-22\ m/s}{5}\\\\\a=\dfrac{14}{5}\ m/s^2\\\\a=2.8\ m/s^2

So, the acceleration of the object is 2.8\ m/s^2.

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How are electric motors and generators similar? 
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Answer:

they both produce energy

Explanation:

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If the half life of an isotope is 20 years, how much of the original amount will
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Answer:

Half

Explanation:

6 0
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