6 N M 8N <br>What is the net force?

How does kinetic energy affect the stopping distance of a vehicle traveling at 30 mph compared to the sane vehicle traveling 60

timofeeve [1]

Kinetic energy in the faster car is way too uzi fast to be stopped faster since it has less kodak potential energy. The slower car has more potential energy so it will be able to lil stop boat at a much smoother and shorter distance.

4 0

3 years ago

Help please!

Marina CMI [18]

It's the old-but-important concept: "Speed" depends on who's measuring it and how THEY're moving. Different observers may very well observe different speeds, and they're all correct. There's no such thing as "the REAL speed".

When you were a little kid, did you ever get on a moving escalator or walkway, and when you got to the middle, you turned around and walked the <em>opposite</em> way, so that somebody watching you from the outside would see you not moving at all ?

Say you're on a school bus that's driving 10 mph along the street pavement, and you get up out of your seat and run forward up the aisle at 10 mph. Somebody outside the bus sees you passing them at 20 mph !

If instead, you run toward the BACK of the bus at 10 mph, somebody outside the bus sees you bobbing up and down but not moving forward or backward at all.

All this problem is saying is: The bus is driving along at 15 m/s. A passenger on the bus puts his little baseball down on the floor on its little feet, and it runs backwards down the aisle, toward the back of the bus, at 15 m/s. Somebody is standing outside looking into the bus as it passes by and the little baseball is scurrying toward the back of the bus. How will HE describe the motion of the baseball ?

Have you got it now ?

"Relative to the Earth" just means how fast an object is passing the stores and telephone poles and people standing still ... things that are attached to the Earth. "Relative to the bus" would mean how fast an object is passing by people sitting on the bus.

6 0

3 years ago

16. Kinematic equations can only be used if...

Effectus [21]

the acceleration or the next force acting on the body is constant

7 0

3 years ago

A force of 30N acts through a distance of 4m in the direction of the force, what is the work done

Rufina [12.5K]

Answer:

120J

Explanation:

Work done = Force (N) X Distance (m)

3 0

3 years ago

Read 2 more answers

If you were in a spaceship watching a ball hover at rest (inside the spaceship) in mid-air, and the spaceship suddenly began rap

USPshnik [31]

Answer:

It will still hover until the spaceship "hits" or exerts a force on it.

Explanation:

Remember, if there is no net force, there is no acceleration or movement.

In this case, our ball is hovering in the spaceship, and in space, we can assume there is no $F_g$ , and we can assume there is no $F_N$ , nor no forces acting against it.

So, the ball would not move.

However, once the spaceship starts accelerating, the ball would still hover until the spaceship exerts a force on it.

This is because of the same thing as explained above, no forces acting on it, therefore, no acceleration.

Think about it this way.

Imagine you jumped up, then someone threw a ball at you. Now let's imagine you can't move until you hit the floor, meaning that in an ideal situation only $F_g$ is acting on you. Now again, let's imagine time slows really down for you, but not the ball. Before the ball comes and hits you, you are "hovering" like a ball. But after the ball hits you, you move a little because the ball exerted a force on you.

If you did not understand what I meant above, just forget about it, and think about the fact that if there is a Net force (all the force values added up), then there is acceleration and movement.

4 0

2 years ago

6 N M 8N What is the net force?​

6 N M 8N What is the net force?