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3 years ago

a person walks 750m due north then 250 m due east of the entire walk takes 12 min find the person average velocity

Physics

1 answer:

Virty [35]3 years ago

6 0

Answer:

v = 1.098 m/s

Explanation:

Given that,

A person walks 750m due north then 250 m due east of the entire walk takes 12 min.

We need to find the average velocity of the person.

Displacement,

$d=\sqrt{750^2+250^2} \\\\d=790.56\ m$

Average velocity = displacement/time

$v=\dfrac{790.56\ m}{12\times 60\ s}\\\\v=1.098\ m/s$

So, the average velocity of the person is 1.098 m/s.

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nadya68 [22]

Acceleration = change in velocity/time
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3 years ago

Two objects are thrown vertically upward, first one, and then, a bit later, the other. Is it (a) possible or (b) impossible that

Studentka2010 [4]

Answer:

No, it is impossible

Explanation:

Kinematics equation:

$Vf^{2} =Vo^{2} -2gy$

if height is maximum:

y=H and Vf=0

so:

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3 years ago

When you lift a bowling ball with a force of 61.1 N, the ball accelerates upward with an acceleration a. If you lift with a forc

gtnhenbr [62]

Answer:

the weight of the ball is w = 51.94 N ( mass = 5.3 kg)

Explanation:

Following Newton's second law:

net force = mass * acceleration = weight/gravity * acceleration

then denoting 1 and 2 as the first and second lift

F₁ - w= w/g *a₁

F₂ -w = w/g *a₂ = w/g * 2.07a

dividing both equations

(F₂- w)/(F₁ -w)= 2.07

(F₂- w) = 2.07 * (F₁ -w)

1.07*w = 2.07*F₁ - F₂

w = (2.07*F₁ - F₂ )/ 1.07

replacing values

w = (2.07*61.1 N - 70.9 N )/ 1.07 = 51.94 N

then the weight of the ball is w = 51.94 N ( mass = 5.3 kg)

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2 years ago

is this true or false? an object with a mass of 9.0kg has an acceleration of 3m/s2. the force acting on it is 3N

ludmilkaskok [199]

The answer is "False". The force acting on the object is 27 N.

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$F=ma$

Thus, if the body has a mass of 9.0 kg and if it has an acceleration of 3 m/s², then, on substituting the values in the equation for force,

$F=ma\\ =(9.0kg)(3m/s^2)\\ =27N$

Thus, it can be seen that the force acting on the body is 27 N and not 3 N as is mentioned in the statement. Hence the statement is false.

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3 years ago

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<h2>Therefore, the answer is 2.</h2>

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1 year ago

a person walks 750m due north then 250 m due east of the entire walk takes 12 min find the person average velocity​

a person walks 750m due north then 250 m due east of the entire walk takes 12 min find the person average velocity