All categories

3 years ago

The skater is has a mass of 75 kg. Find the total Potential energy of the skater at the top of the ramp at 6 m.

Physics

1 answer:

olga_2 [115]3 years ago

5 0

Epot= mgh= 75*9,81*6= 4415 j

You might be interested in

One least interesting thing about collisions?

luda_lava [24]

A change in momentum is called impulse.

5 0

3 years ago

A proton initially has v=4.0i^−2.0j^+3.0k^ and then 4.0 s later has v=−2.0i^−2.0j^+5.0k^ (in meters per second). For that 4.0 s,

pishuonlain [190]

Answer:

$a_{avg}=-1.5i+0.5k$

$1.58113883008\ m/s^2$

$-18.43^{\circ}\ or\ 161.57^{\circ}$

Explanation:

u = 4.0i−2.0j+3.0k v = −2.0i−2.0j+5.0k

Average acceleration is given by

$a=\dfrac{v-u}{t}\\\Rightarrow a=\dfrac{-2-4, -2+2, 5-3}{4}\\\Rightarrow a=-1.5i-0j+0.5k$

$a_{avg}=-1.5i+0.5k$

The magnitude is

$a_{avg}=\sqrt{(-1.5)^2+0.5^2}\\\Rightarrow a_{avg}=1.58113883008\ m/s^2$

The magnitude is $1.58113883008\ m/s^2$

The angle is

$\theta=tan^{-1}\dfrac{a_z}{a_x}\\\Rightarrow \theta=tan^{-1}\dfrac{0.5}{-1.5}\\\Rightarrow \theta=-18.43^{\circ}\ or\ 161.57^{\circ}$

The angle between $a_{avg}$ and the positive direction of the x axis is $-18.43^{\circ}\ or\ 161.57^{\circ}$

4 0

3 years ago

Two balls of unequal mass are hung from two springs that are not identical. The springs stretch the same distance as the two sys

IRISSAK [1]

Answer:

b) Springs oscillate with the same frequency,

Explanation:

expression for frequency of vibration of mass hanging from a spring is given as follows

f = $\frac{1}{2\pi} \times \sqrt{\frac{k}{m} }$

k is force constant of spring and m is mass vibrating .

In the present case, if mass stretches the spring by x and remains balanced

mg = k x

$\frac{k}{m} =\frac{g}{x}$

g and x are same for both cases

$\frac{k}{m}$ will also be same for both cases .

Hence frequency of vibration will also be same for both the balls .

4 0

3 years ago

What is the defining feature of isotopes of the same element?

pogonyaev

Answer: Isotopes. An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

https://www.sciencedirect.com › topics

6 0

2 years ago

A 0.62kg basketball is dropped from a height of 1.7 meters. How much work is done ?

Ray Of Light [21]

Answer:

The work done is 10.64Joules

8 0

2 years ago