3 years ago

Imagine a 10kg block moving with a speed of 20m/s. calculate the kinetic energy of this block

Physics

1 answer:

avanturin [10]3 years ago

7 0

$E_{c}=\frac{mv^2}{2}=2000J$

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B precipitation,condensation,precipitation

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An organ pipe of length 3.0 m has one end closed. The longest and next-longest possible wavelengths for standing waves inside th

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The longest wavelength for closed at one end and open at the other is

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Is a sound wave mechanical or an electromagnetic wave

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3 years ago

A runner with a mass of 62 kg running at speed of 0.8m/s

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Answer:

so the kinetic energy is 20Nm

Explanation:

mass of the body=m=62kg

velocity of the body=v=0.8m/s

K.E.=?

AS WE KNOW THAT

K.E.= $\frac{1}{2}$ mv²

putting values

K.E.= $\frac{1}{2}}$ ×62kg×(0.8m/s)²

K.E.=31kg×0.64m²/s²

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6 0

4 years ago

Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net external force o

makkiz [27]

$F_1=207.5\ N$

$F_2=92.5\ N$

Explanation:

Let $F_1\ and\ F_2$ is the two forces acting on the raft. If they pull in the same direction, the net force is given by :

$F_1+F_2=300$ ...............(1)

If they pull in opposite direction, net force is given by :

$F_1-F_2=115$ ...............(2)

It is required to find the magnitude of both forces. On solving equation (1) and (2) we get :

$F_1+F_2=300$

$F_1-F_2=115$

$F_1=207.5\ N$

$F_2=92.5\ N$

So, the forces are 207.5 N and 92.5 N. Hence, this is the required solution.

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3 years ago