3 years ago

Which units are used to express kinetic energy?

Physics

2 answers:

Crazy boy [7]3 years ago

8 0

Answer: Joules

Hope This Helps, Please Vote Brainliest!!

labwork [276]3 years ago

4 0

Answer:

The SI units for energy is Joules.

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A student evaluates a weight loss program by calculating the number of times he would need to climb a 14.0 m high flight of step

Liula [17]

Answer:

400 trips

Explanation:

Mechanical energy needed to climb 14 m by a man of 68 kg

= mgh

= 68 x 9.8 x 14

= 9330 J

1 Kg of fat releases 3.77 x 10⁷ J of energy

.45 kg of fat releases 1.6965 x 10⁷ J of energy

22% is converted into mechanical energy

so 22% of 1.6965 x 10⁷ J

= 3732.3 x 10³ J of mechanical energy will be available for mechanical work.

one trip of climbing of 14 m requires 9330 J of mechanical energy

no of such trip possible with given mechanical energy

= 3732.3 x 10³ / 9330

= 400 trips

7 0

3 years ago

What is the gravitational potential energy of a tiger that weighs 200 N standing on a rock that is 2 m above the ground?

Nikitich [7]

G.P.E = mgh
Weight = mg = 200N

So G.P.E = 200 * 2 = 400 Joules

5 0

3 years ago

I will give brainliest

Inga [223]

Answer:

it has nucleus

Explanation:

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7 0

4 years ago

Read 2 more answers

Which resistor dissipates the most power, the one with the greatest resistance or the one with the least resistance? explain why

Klio2033 [76]

The power dissipated by a resistor is equal to
$P=R I^2$
where R is the value of the resistance and I is the current flowing through the resistor. From the formula, we can see that the larger R, the larger the dissipated power, so the greatest resistance dissipates more power.

5 0

3 years ago

A football game customarily begins with a coin toss to determine who kicks off. The referee tosses the coin up with an initial s

Cerrena [4.2K]

Answer:

The coin travels 1.8348 meters above its point of release.

Explanation:

Initial speed = 6 m/s (Assumed vertical speed as not stated in question)

Final Speed = 0 m/s (at the highest point in air)

Acceleration due to gravity = -9.81 m/s^2

Equation of motion used:

$(V_f)^2 - (V_i)^2 = 2 *a * s$

$0^2 - 6^2 = 2 * (-9.81) * s$

s = 1.8348 m

Thus, the coin will travel 1.8348 meters up to its highest point in the air.

8 0

3 years ago