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3 years ago

15

A bike is moving at a velocity of 50 m/s. It increases in velocity until it reaches 150 m/s in seconds. What is the acceleration

?

1 answer:

Lunna [17]3 years ago

4 0

Answer:

100

Explanation:

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When an electron is added to a neutral atom of an element to form a negative ion, the resulting change in energy is referred to

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3 years ago

An engine pulls a train of 20 freight cars, each having a mass of 4.900 × 104 kg, with a constant force. The cars move from rest

bixtya [17]

Answer:

The force with which the tenth car pulls the eleventh one is called tension and is equal to:

T=119715.91 N

Explanation:

The force (F) with which the tenth car pulls the eleventh one is called tension and its direction is the X-direction or horizontal. According to Newton's Second Law of motion:

$\sum F=ma$

That is, the force of the car is equal to the acceleration (a) times its mass (m). The acceleration is the change in the velocity divided by the time (i is for initial and f is for final).

$a=\frac{v_f-v_i}{t_f-t_f}$

Using Newton's second law:

To find the forces, you have to solve the equilibrium in X-direction:

$\sum F_x=T=ma_x$

Now you can substitute the accelertion in terms of velocity and time:

$\sumF_x=T=ma_x=m\frac{v_f-v_i}{t_f-t_i}$

Solve the equation using the data from the problem, remember that the mass of the object is 10 times the mass of one car because the 10th car has to pull all the other cars:

$T=m\frac{v_f-v_i}{t_f-t_i}=(10)*(4.900 \times 10^4 kg)(\frac{4.3 m/s}{17.60s})\\T=119715.91 N$

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3 years ago

An object of mass m is oscillating with a period T. The position x of the object as a function of time is given by the equation

Scrat [10]

What the equation given?

x(t)=Acos $\omega$ t

Maximum velocity occurs at the equilibrium position

So

x=0

Now

x(0)=Acos0[/tex]
x(0)=A

Now

As we know the formula

$\\ \rm\rightarrowtail V_max=A\omega$

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2 years ago

A very long straight current-carrying wire produces a magnetic field of 20 mt at a distance d from the wire. to measure a field

padilas [110]

The distance covered is 4d.

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A distance function or metric is a technique to describe what it means for components of space to be "near to" or "far away" from each other in mathematics.
It is a generalization of the idea of physical distance. Distance is a non-numerical unit of measurement in psychology and the social sciences; psychological distance is the separation of an object from itself along dimensions including time, space, and isolation.

We know that

the magnetic field is inversely proportional to distance.

$\dfrac{B_1}{B_2} = \dfrac{D_2}{D_1}$

$\dfrac{20}{5} = \dfrac{D_2}{d}$

$D_2 = 4d$

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