30 Pts! Answer fast please!<br> mass= 1 kg KE= 18 Joules <br> What is the velocity?

While sitting on the couch, I am pushing down on it and it is pushing up on me. Which of Newton's laws of motion is this demonst

ArbitrLikvidat [17]

The third law of motion. Every action has an equal and opposite reaction. You exert a force on it and it exerts it back.

7 0

3 years ago

Read 2 more answers

The magnetic field is 0.0 2M from the wire is 0.1 T what is the magnitude of the magnetic field 0.0 1M from the same wire

Kisachek [45]

Answer:

0.2 T

Explanation:

Magnetic field is inversely proportional to the distance from wire since the distance is halved therefore magnetic field will be doubled.

4 0

3 years ago

Choose the option below that best completes this sentence: when two circuit elements (e.g., light bulbs, resistors, etc.) are in

Likurg_2 [28]

When two circuit elements (e.g., light bulbs, resistors, etc.) are in PARALLEL, the voltage drop across each element must be the same. (choice-b)

When the same two circuit elements are in SERIES, the current through each element must be the same.

7 0

3 years ago

Tether ball is a game children play in which a ball hangs from a rope attached to the top of a tall pole. The children hit the b

Murljashka [212]

Answer:

a_total = 14.022 m/s²

Explanation:

The total acceleration of a uniform circular motion is given by the following formula:

$a=\sqrt{a_c^2+a_T^2}$ (1)

ac: centripetal acceleration

aT: tangential acceleration

Then, you first calculate the centripetal acceleration by using the following formula:

$a_c=r\omega^2$

r: radius of the circular trajectory = 2.0m

w: final angular velocity of the ball = 7.0 rad/s

$a_c=(2.0m)(7.0rad/s)^2=14.0\frac{m}{s^2}$

Next, you calculate the tangential acceleration. aT is calculate by using:

$a_T=r\alpha$ (2)

α: angular acceleration

The angular acceleration is:

$\alpha=\frac{\omega_o-\omega}{t}$

wo: initial angular velocity = 13 rad/s

t: time = 15 s

Then, you use the expression for the angular acceleration in the equation (1) and solve for aT:

$a_T=r(\frac{\omega_o-\omega}{t})=(2.0m)(\frac{7.0rad/s-13.0rad/s}{15s})=-0.8\frac{m}{s^2}$

Finally, you replace the values of aT and ac in the equation (1), in order to calculate the total acceleration:

$a=\sqrt{(14.0m/s^2)^2+(-0.8m/^2)^2}=14.022\frac{m}{s^2}$

The total acceleration of the ball is 14.022 m/s²

5 0

3 years ago

Which part of the scientific process includes identifying problems? A.(Collecting data) B.(Doing experiments) C.(Making observat

Ksivusya [100]

Making observations.

5 0

3 years ago

Read 2 more answers

30 Pts! Answer fast please! mass= 1 kg KE= 18 Joules What is the velocity?