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kvasek [131]
3 years ago
9

According to Newton’s first law of motion what will an object in motion do when no external force acts on it?

Physics
1 answer:
PIT_PIT [208]3 years ago
4 0
The object will continue moving in a straight line at constant speed.
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An object is thrown up at 20m/s if it hits the ground after 10s,determine the final velocity and the height
dangina [55]

1) The final velocity of the object is -78 m/s (downward)

2) The final height of the object is -290 m

Explanation:

1)

When the object is thrown up, it follows a free fall motion, subjected only to the force of gravity (that pulls the object downward). Therefore, the object has a constant acceleration

g=9.8 m/s^2

towards the ground (acceleration of gravity).

Since this is a motion with constant acceleration, we can use the following suvat equation:

v=u+at

where

v is the final velocity

u is the initial velocity

a = g is the acceleration

t is the time of flight

In this problem we have:

u = +20 m/s (taking upward as positive direction)

t = 10 s is the time of flight

g=-9.8 m/s^2 (downward, so negative)

Solving for v, we find the final velocity:

v=20+(-9.8)(10)=-78 m/s

2)

For this part of the problem, we can use another suvat equation:

s=ut+\frac{1}{2}at^2

where

u is the initial velocity

a is the acceleration

t is the time

s is the displacement of the object

In this problem,

u = +20 m/s

t = 10 s

g=-9.8 m/s^2

Substituting, we find the final position of the object with respect to the initial position:

s=(20)(10)+\frac{1}{2}(-9.8)(10)^2=-290 m

Learn more about uniform accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

5 0
3 years ago
Which growth model is a realistic representation of population growth?
Gelneren [198K]
The logistic model<span> takes the shape of a sigmoid curve and describes the </span>growth<span> of a</span>population<span> as exponential, followed by a decrease in </span>growth<span>, and bound by a carrying capacity due to environmental pressure</span>
6 0
3 years ago
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What part of an electric circuit are the wires that carry the electric current
bezimeni [28]

Answer:

okay so, An electric circuit is a closed loop through which current can  actually flow. All electric circuits must have a voltage source, for example a battery, and a conductor, which is usually  a wire.

how does it flow or how does .current flow in a circuit ? When a wire is connected to battery terminals which is electrons, electrons flow from negative to positive. Electrons have a negative charge in case you didnt know. they are repelled from the negative and attracted to the positive.

if this helped please mark this as brainliest!!! :)

8 0
3 years ago
What is the minimum speed necessary to make it safely??
spayn [35]

Answer:

10-15mph

Explanation:

5 0
3 years ago
Which is most buoyant in water? F) wood H) lead weight G) penny J) sugar
Zarrin [17]

Wood has a lower density than water, and thus the upward buoyant force provided by the water is equal to the weight of the wood submerged.

Penny has a smaller density

I would say wood would be ur best option.

5 0
3 years ago
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