All categories

3 years ago

What is an example of "potential energy"?

Physics

1 answer:

FinnZ [79.3K]3 years ago

7 0

Answer:

A heavy ball of demolition machine is storing energy when it is held at an elevated position .

You might be interested in

The rest deltoid row is a back exercise true or false

bixtya [17]

False because your deltoids are in your shoulders not your back

3 0

3 years ago

A horizontal 2.00\ m2.00 m long, 5.00\ kg5.00 kg uniform beam that lies along the east-west direction is acted on by two forces.

Sunny_sXe [5.5K]

Answer: $240\ rad/s^2$

Explanation:

Given

Length of beam $l=2\ m$

mass of beam $m=5\ kg$

Two forces of equal intensity acted in the opposite direction, therefore, they create a torque of magnitude

$\tau =F\times l=200\times 2=400\ N.m$

Also, the beam starts rotating about its center

So, the moment of inertia of the beam is

$I=\dfrac{ml^2}{12}=\dfrac{5\times 2^2}{12}\\\\I=\dfrac{5}{3}\ kg.m^2$

Torque is the product of moment of inertia and angular acceleration

$\Rightarrow \tau=I\alpha\\\\\Rightarrow 400=\dfrac{5}{3}\times \alpha\\\\\Rightarrow \alpha =240\ rad/s^2$

7 0

3 years ago

Why is visual constancy important?

weqwewe [10]

Answer:

Explanation:

Visual constancy is a key mechanism that allows the perception to remain.the same even as images change

#<em><u>CARRYONLEARNING</u></em>

4 0

2 years ago

A ball is dropped from the roof of a 25-m-tall building. What is the velocity of the object when it touches the ground? Suppose

Wewaii [24]

Answer:

a) $h=25m$

b) $v=19.8m/sec$

Explanation:

From the question we are told that:

Height $h=25m$

Bounce Height $h'=20m$

Generally the Kinematic equation is mathematically given by

$V=\sqrt{2gh}\\\\V=\sqrt{2*9.81*25}$

$V=22.1m/sec$

Therefore Height

$h=\frac{V^2}{2g}\\\\h=\frac{22.1^2}{2*9.81}$

$h=25m$

Generally the Kinematic equation is mathematically given by

$v^2=2ah$

$v^2=2*9.8*20$

$v=\sqrt{2*9.8*20}$

$v=19.8m/sec$

3 0

3 years ago

Why must there be a chain at the bottom of a truck

MrRa [10]

Answer:

Known as automatic tire chains and sometimes referred to by brand names like Onspot or Insta-Chain, these chains essentially hang listlessly from the vehicle's suspension until inclement weather arrives. When that happens, a driver can flip a switch that will lower the chains so they hang in front of the back tires.

Explanation:

(Happy to Help)

7 0

2 years ago