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3 years ago

7

What is the displacement and explain

1 answer:

34kurt3 years ago

4 0

Displacement implies that an object has moved, or has been displaced. Displacement is also a vector and it means that it has a direction as well as a magnitude and is represented visually as an arrow that points from the initial position to the final position.

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How much would your 20.0 kg dog weigh on Neptune?

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ANS: F= 260 N=2.60x10^2 N

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When a cold can of soda is insulated, the heat flow into the can on a hot day ____. a. increases c. stays the same b. decreases

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The answer is decrease

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4 years ago

An ambulance is currently traveling at 15m/s, and is accelerating with a constant acceleration of 5 m/s^2. The ambulance is atte

Lorico [155]

initial velocity=15m/s=u
Acceleration=a=5m/s^2
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Using 3rd equation of kinematics

$\\ \rm\longmapsto v^2-u^2=2as$

$\\ \rm\longmapsto s=\dfrac{v^2-u^2}{2a}$

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3 years ago

4. Calculate the kinetic energy of a 4.7 kg object moving at a speed of 7 m/s. SHOW YOUR WORK

SashulF [63]

Answer:

$\boxed {\boxed {\sf 115.15 \ J}}$

Explanation:

Kinetic energy is the energy an object possesses due to motion. It is calculated with the following formula.

$E_K= \frac{1}{2} mv^2$

The mass of the object is 4.7 kilograms. The velocity of the object is 7 meters per second.

m= 4.7 kg
v= 7 m/s

Substitute the values into the formula.

$E_K= \frac{1}{2} (4.7 \ kg)(7 \ m/s)^2$

Solve the exponent.

(7 m/s)²= 7 m/s * 7 m/s = 49 m²/s²

$E_K= \frac{1}{2} (4.7 \ kg)(49 \ m^2/s^2)$

Multiply the numbers together.

$E_K = 2.35 \ kg * 49 \ m^2/s^2$

$E_K= 115.15 \ kg*m^2/s^2$

Convert the units. 1 kilogram square meter per square second is equal to 1 Joule.

$E_K= 115.15 \ J$

The object has <u>115.15 Joules</u> of kinetic energy.

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2 years ago

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