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The foundation of physics is Newton's equation, force equals mass times acceleration. Hence, for a given amount of force, more mass equals less acceleration. Or in other words, it takes force to move a weight. The more weight you are trying to move, the more force you need.

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What force could be added to slow a car down when it is going down a ramp?

Friction between the tires and the road surface can slow down a car going down a ramp. The brakes can also be applied to introduce additional friction and slow the car further. Additionally, aerodynamic drag can play a minor role in slowing down the car at higher speeds.


What factor causes the motion of a car to slow down as it is moving up the slope of a mountain?

The main factor that causes the motion of a car to slow down as it moves up a slope is gravity. Gravity acts in the opposite direction to the car's motion, pulling it back down the slope. This force opposes the car's forward movement, making it slow down.


How does gravity slow down a car?

Gravity itself does not slow things down (the Moon still keeps going round the Earth and the Earth still keeps going round the Sun). It's friction that slows things down. I have to say that there is likely to be more friction if there's more gravity but that's a secondary effect.


Which forces slow things down out of upthrust friction weight and air resistance?

Friction, weight, and air resistance are forces that can slow things down. Friction opposes the motion of objects sliding past each other, weight is the force due to gravity pulling objects downwards, and air resistance is caused by air pushing against objects moving through it. Upthrust, also known as buoyancy, is a force that opposes weight but typically does not slow objects down.


Suppose that you are in a moving car and the motor stops. You step on the brakes and slow the car to half speed. If you release your foot will the car speed up or continue at half speed or slow down?

Assuming you are not pressing down on the gas, when you release the pedal, the car will slow down over time and evetualy come to a stop. Unless you are going down a hill, in which case you will speed up.