Question

a pair of fuzzy dice are dangling from the rear view mirror of a car. when the car accelerates forward how are the dice likely to move, according to newton's first law?w are the dice likely to move, according to newton's first law?

Answer 1

Newton's first law states that an object at rest will stay at rest and an object in motion will stay in motion. So when the car is not moving, the dice will hang directly downwards, being pulled by down by gravity and up by the force normal created of the mirror, equally. But if you start to move forward, then the dice must react in some way, because it is being affected by motion. So the dice will now gravitate towards the back of the vehicle.
You don't notice it but your body is also pulled toward the back of the vehicle. The difference is that you can see the dice. In fact, when you first start to accelerate in your car, you can feel the pull into your seat, but soon you get used to it, and that is what's called relativity.
So the you and the dice are being pulled toward the back of the vehicle, and you can calculate how powerful that force is using F=ma

Answer 2

Backwards

Step-by-step explanation:

Now here we need to understand first law of motion. Which states that:

"A body will always remain in its current state of motion unless an external force is applied to it."

This is also called law of inertia. Inertia is a tendency of a body to maintain its current state of motion. It means if a body is at rest it will remain at rest, or if in motion, will remain in motion until an external force is applied to change its current state of motion.

Now if car is at rest, pair of dice will be hanging straightly in a rest position, toward the earth. When car start to move, these dangling dices will try to maintain their state of rest and resist any kind of motion. So for forwarding car, they will be appeared as moving backwards, although they will be just trying to remain in state of rest. And they will synchronize their motion with speed of car after sometime. Now if car accelerates forward again, this pair of dice will again try to remain at its current speed and appeared to push backwards with accelerating speed of car.