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3 years ago

13

What happens to the total energy of the system (again, cart only) as the cart goes from its starting point to the bottom of the

ramp?

1 answer:

loris [4]3 years ago

6 0

Answer:

5

Explanation:

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If a swimmer pushes off a pool wall with a force of 250n, what is her acceleration.

grigory [225]

Her acceleration is

(250) divided by (the swimmer's mass, in kilograms).

The unit is " meters per second² " .

3 0

3 years ago

The thunderbolt bobsled team is training for Olympic Gold. During practice they start a run with a speed of 0.57 m/s, they compl

aleksandr82 [10.1K]

$acceleration=\frac{\Delta\ velocity}{\Delta\ time}\\\\
v_{initial}=0,57m/s\\
distance=1360m\\ \Delta\ time=89,49seconds\\\\
v_{final}-v_{initial}=\frac{distance}{time}\\
v_{final}=\frac{distance}{time}+v_{initial}\\
v_{final}=\frac{1360}{89,49}+0,57\\\\v_{final}=15,77\frac{m}{s}\\\\
acceleration=\frac{15,77-0,57}{89,49}=0,17\frac{m}{s^2}\\\\ \boxed{acceleration=0,17\frac{m}{s^2}}$

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4 years ago

A particle is moving along a circular path of 2-m radius such that its position as a function of time is given by u = (5t 2) rad

OverLord2011 [107]

Answer:

Explanation:

Given

radius of path $r=2\ m$

Velocity of Particle $\theta =5t^2 rad$

where t=time in seconds

angular velocity of particle is given by

$\omega =\frac{\mathrm{d} \theta }{\mathrm{d} t}$

$\omega =2\times 5t=10\cdot t$

And angular acceleration is given by

$\alpha =\frac{\mathrm{d} \omega }{\mathrm{d} t}$

$\alpha =10 rad/s^2$

tangential acceleration is $a_t=\alpha \times r$

$a_t=10\times 2=20\ m/s^2$

Centripetal acceleration $a_c=\omega ^2\times r$

$a_c=(10t)^2\times 2=200t^2$

net acceleration is sum of tangential and centripetal force at any time t is given by

$a_{net}=\sqrt{(a_c)^2+(a_t)^2}$

$a_{net}=\sqrt{(200t)^2+(20)^2}$

$a_{net}=20\sqrt{(10t)^2+1}\ m/s$

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3 years ago

What are the main ideas of physical science

scoray [572]

Physical science is defined as the study of observable phenomena in the universe.<span>The main idea of physical science is known as the "scientific method". </span>

<span>This method states: </span>

<span>1. observe a "real" ( not imaginary ) phenomena. </span>

<span>2. make a hypothesis ( or theory / idea ) that EXPLAINS this phenomena. </span>

<span>3. conduct a real experiment to test this hypothesis. </span>

<span>4. confirm that the experiment validates the original hypothesis and if necessary amend the theory. </span>

<span>This method is responsible for virtually every scientific explanation of every kind. </span><span>It has worked so well that the very communication you are having with me is a result of the wonders of physical science. </span>

<span>Hope your question was answered :)</span>

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3 years ago

What does this circuit do? T is the clock All flip flops are D-Flip-Flop What is the function of the circuit if Dser is ‘1’ alwa

Harlamova29_29 [7]

Answer:

That is true

Explanation:

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3 years ago