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3 years ago

If an object is accelerating, it is traveling the same distance for each time interval of its motion

Physics

2 answers:

Elenna [48]3 years ago

6 0

The answer is false :)

Anika [276]3 years ago

4 0

Answer:

false

Explanation:

if an object is accelerating the object will not travel the same distance every time interval

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In order for work to be done, what three things are necessary?

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The three things that are necessary are power, a force, and movement in the opposite direction of the applied force.

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* A ball is projected horizontally from the top of

bagirrra123 [75]

Explanation:

Given

Ball is projected horizontally from a building of height $h=19.6\ m$

time taken to reach ground is given by

$\text{Cosidering vertical motion}\\\Rightarrow h=ut+0.5at^2\\\Rightarrow 19.6=0+0.5\times 9.8t^2\\\Rightarrow t^2=4\\\Rightarrow t=2\ s$

(b) Line joining the point of projection and the point where it hits the ground makes an angle of $45^{\circ}$

From the figure, it can be written

$\Rightarrow \tan 45^{\circ}=\dfrac{h}{x}\\\\\Rightarrow x=h\cdot 1\\\Rightarrow x=19.6$

Considering horizontal motion

$\Rightarrow x=u_xt\\\Rightarrow 19.6=u_x\times 4\\\Rightarrow u_x=4.9\ m/s$

$\Rightarrow v^2-u_y^2=2as\\\Rightarrow v^2-0=2\times 9.8\times 19.6\\\Rightarrow v=\sqrt{384.16}\\\Rightarrow v=19.6\ m/s$

Thus, the ball strikes with a vertical velocity of $19.6\ m/s$

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3 years ago

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18. When considering a magnet's force of attraction over a known distance, you would expect the strength of attraction 4 inches

sineoko [7]

C. 16 times
Because depending on this ... (4)^2= 16
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a car with a mass of 1.2×10^3 kilograms is moving at a speed of 18 meters/second. it is hit by a truck from behind and it's spee

garik1379 [7]

I = Delta p

I = Impulse
Delta p = Momentum variation

Delta p = pf - po

Pf = Final momentum
Po = Initial momentum

p = m x v

M = Mass
V = Velocity

Delta p = (m x Vf) - (m x Vo)

I = 1.2 x 10^3 x 20 - 12 x 10^2 x 18
I = 2.4 x 10^4 - 216 x 10^2
I = 2.4 x 10^4 - 2.16 x 10^4
I = 0.24 x 10^4
I = 24 x 10^2 Newtons x seconds (N x s)

Answer: The value of impulse is 24 x 10^2 Newtons x seconds (N x s).

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3 years ago

The energy levels the electron can occupy in the Be3+ ion can be calculated using the energy level equation. Calculate the frequ

hram777 [196]

Answer:

1.32×10^16 hz

Explanation:using Rydberg equation:

1/λ = RH •Z^2[ (1/n1) - (1/n2) ]

RH = Rydberg constant = 1.097 x 10^7 m-1)

n1 and n2 = energy levels (n2 >n1)

Z = atomic number = 4

Substitute

1/λ = 1.097×10^7 • 4^2[ (1/2) - (1/4) }

λ = 2.28 × 10^-8m

From the equation of light

C= fλ

C=3×10^8m/s

f = 3×10^8/2.28×10^-8

f = 1.32×10^16 hz

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3 years ago