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3 years ago

6

When is a body said to be at res

1 answer:

Aleksandr [31]3 years ago

7 0

When there is no motion a body is at rest

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It moved from 0 cm to 5 cm at a constant speed of 1 cm/s.

Stels [109]

It moved from 0 cm to 4 cm at a constant speed of 1 cm/s.

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3 years ago

What is a meter? give 2 examples of objects that are a meter in lengh

ss7ja [257]

Answer:

A yardstick and a baseball bat

4 0

2 years ago

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is_____

Bond [772]

When you are talking about calculating the kinetic energy of an object, the formula is as stated:

Ek =1/2mv²

Where m is mass and v is velocity. Sub all those numbers in and you'll get 25J of kinetic energy.

3 0

2 years ago

When does the mechanical energy of a body falls freely equal twice its potential energy ?

Ilia_Sergeevich [38]

<span>As the body rises up its gravitational potential energy increases but its kinetic energy decreases.

As a body falls its gravitational potential energy decreases but it's kinetic energy increases</span>

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3 years ago

Suppose a tidal basin is 6 m above the ocean at low tide and that the area of the basin is 5×107 m2. Estimate the gravitational

Neko [114]

Answer:

Potential energy will be $176.58\times 10^{11}j$

Explanation:

We have given the height of the basin is h = 6 m

Area of the basin $A=5\times 10^7m^2$

Volume $V=area \times height=5\times 10^7\times 6=30\times 10^7m^3$

Density $\rho =1000kg/m^3$

We know that mass is given by $m=\rho V=1000\times 30\times 10^7=3\times 10^{11}kg$

We know that potential energy is given by $E=mgh=3\times 10^{11}\times 9.81\times 6=176.58\times 10^{11}j$

3 0

2 years ago