All categories

4 years ago

A car accelerates from rest at 5 m/sec2 for 12 seconds what is the final velocity

Physics

1 answer:

VladimirAG [237]4 years ago

7 0

Vi =0 ( as car starts from rest )

Acceleration= a = 5m/s²

t =12sec

Vf =Vi + at

Vf= 0 + (5m/s²) (12s)

Vf=60 m/s

You might be interested in

What features did you find most interesting about the Elizabethan-era globe theatre? Check any that apply

sweet [91]

Answer: 1,2,3,4,6 are all correct

Explanation:

i just took the test and got them all right

7 0

3 years ago

Read 2 more answers

Why should we not use nuclear energy

Softa [21]

Answer:

Barriers to and risks associated with an increasing use of nuclear energy include operational risks and the associated safety concerns, uranium mining risks, financial and regulatory risks, unresolved waste management issues, nuclear weapons proliferation concerns, and adverse public opinion.

Explanation:

5 0

3 years ago

3. Is the relationship between the gravitational force and the mass directly proportional or

Dmitrij [34]

Answer:

Directly Proportional

Explanation:

Gravitational force can be calculated with the equation F = g(m1 * m2)/ r^2

So if we increase mass, force will also increase because mass is in the numerator.

5 0

3 years ago

If you found yourself on the see-through side of this one-way mirror what is the best way you could prevent someone on the other

Taya2010 [7]

Answer:

If there is any sheets or padded material in this room you can cover the window, you could turn off all the lights if there is a light switch in the room, you could try to bring a bright flashlight in and shine it into the other room(try to annoy the person watching you so they leave), act really boring and hopefully make the other person lose interest.

Explanation:

(hint) If you actually get in a situation like this place your fingernail against the mirror or glass you think could possibly be a one-way mirror. If there's a gap between your nail and the mirror, it's most likely a genuine mirror :)

7 0

3 years ago

When riding a 10-speed bicycle up a hill, a cyclist shifts the chain to a larger-diameter gear attached to the back wheel. Why i

dimaraw [331]

To solve this problem we will use the concepts of the moment of rotational inertia, angular acceleration and the expression of angular velocity.

The rotational inertia is expressed as follows:

$I = \sum mr^2$

Here,

m = Mass of the object

r = Distance from the rotational axis

The rotational acceleration in terms of translational acceleration is

$\alpha = \frac{a}{R}$

Here,

a = Acceleration

R = Radius of the circular path of the object

The expression for the rotational speed of the object is

$\omega = \frac{\Delta \theta}{\Delta t}$

Here,

$\Delta \theta$ is the angular displacement of the object

The explanation by which when climbing a mountain uphill is changed to a larger pinion, is because it produces a greater torque but it is necessary to make more pedaling to be able to travel the same distance. Basically every turn results in less rotations of the rear wheel. Said energy that was previously used to move the rotation of the wheel is now distributed in more turns of the pedal. Therefore option a and c are correct.

This would indicate that the correct option is D.

8 0

4 years ago