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4 years ago

A horse running at 3 m/s speeds up with a constant acceleration of 5 m/s2. How fast is the

Physics

1 answer:

Elan Coil [88]4 years ago

7 0

Answer:

The horse is going at 12.72 m/s speed.

Explanation:

The initial speed of the horse (u) = 3 m/s

The acceleration of the horse (a)= 5 m/ $s^{2}$

The displacement( it is assumed it is moving in a straight line)(s)= 15.3 m

Applying the second equation of motion to find out the time,

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

$15.3=3t+2.5t^{2}$

$2.5t^{2}+3t-15.3=0$

Solving this quadratic equation, we get time(t)=1.945 s, the other negative time is neglected.

Now applying first equation of motion, to find out the final velocity,

$v=u+at$

$v=3+1.945*5$

$v=3+9.72$

v=12.72 m/s

The horse travels at a speed of 12.72 m/s after covering the given distance.

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A large drill is used to make a hole through rocks in the earths surface to excavate for oil

Mamont248 [21]

Answer:

$\Delta GPE = mg\Delta h$

Explanation:

The gravitational potential energy of an object is the energy possessed by the object due to its location in the gravitational field.

This energy is always measured as a difference with respect a "zero level" - generally taken as the ground level.

Therefore, it generally makes more sense to measure the change in gravitational potential energy of an object when its height is changed; this is given by:

$\Delta GPE = mg\Delta h$

where:

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3 years ago

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3 years ago

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Read 2 more answers

Two forces F1 and F2 are applied at the same point of an object. F1 has a magnitude of 20 N and is directed at an angle of 120 d

butalik [34]

Answer:

The value is $\vec F_{n} = -5.67 i +14.82 j \ \ N$

Explanation:

From the question we are told that

The magnitude of the first force is $F_1 = 20 \ N$

The angle which it makes with the x-axis is $\theta_1 = 120 ^o$

The magnitude of the second force is $F_2 = 5 \ N$

The angle which it make with x-axis is $\theta_2 = -30 ^o$

Generally the x-component of the first force is

$F__{1x}} = 20 cos (120 )$ '

=> $F__{1x}} = -10 \ N$

Generally the y-component of the first force is

$F__{1y}} = 20 sin (120 )$

=> $F__{1y}} = 17.32 \ N$

Generally the vector representation of the first force is mathematically represented as

$\vec F_1 = [ -10 i + 17.32 j \ ] \ N$

Generally the x-component of the second force is

$F__{2x}} = 20 cos (-30 )$

=> $F__{2x}} = 4.33 \ N$

Generally the y-component of the second force is

$F__{2y}} = 20 sin (-30 )$

=> $F__{2y}} = -2.5 \ N$

Generally the vector representation of the first force is mathematically represented as

$\vec F_2 = [ 4.33 i - 2.5 j \ ] \ N$

Generally the net force acting that point is mathematically represented as

$\vec F_{n} = -10 i + 17.32 j + 4.33 i - 2.5 j$

=> $\vec F_{n} = -5.67 i +14.82 j \ \ N$

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3 years ago

The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the _____ and the nitrogen is the _____. soluti

siniylev [52]

The oxygen is the Solute, since this is smaller in quantity.

The Nitrogen is the Solvent, since this is more in quantity.

The air is the Solution, this is the mixture itself.

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