Forces Flashcards
If there is balanced force on the object, the object is…
Stationary or moving at a constant speed.
If there are two objects travelling at the same speed, but one has a mass of 60kg and the other has a mass of 40kg which vehicle will have more friction?
The heavier vehicle.
What is a force?
A force is a push, pull or twist.
Is weight or mass measured by newtons?
Weight
Is mass or weight measured in kilograms?
Mass
If forces are acting on an object that is the same size, but act in different directions, the force is…
Balanced
What force causes an object when moving through water to slow down?
Water resistance.
What is a drag force?
A force that slows the movement of an object in the air or water.
What is air resistance?
The force on an object moving in the air that causes it to slow down .
If opposing forces on an object are unequal they are…
Unbalanced
How many newtons are equivalent to 1 kg?
10
What happens if the forces on a vehicle are unbalanced?
The vehicle will slow down or speed up.
What is upthrust?
A force pushing upwards on an object in a liquid.
What is lift?
A force pushing upwards on an object flying in the air.
What is friction?
The force between two surfaces sliding over one another that causes them to heat up and wear.
How do you calculate gravity from the weight and the mass?
Weight/mass
Is an object heavier submerged in water or in air?
In air
If you submerged an object in water, then measured its apparent weight, how would you tell if it was going to float?
The weight of it in water would be 0.
If you put the same material into salt water and fresh water, in which would the material weigh less?
Salt water
How do you calculate distance?
speed times time
How do you calculate speed?
distance/ time
How do you calculate time?
distance divided by speed
What is a newton meter
A tool used to measure weight
What is thrust?
A push caused by an engine
Why would an object weigh more in one liquid and less in another?
As different liquids have different densities, therefore if you had two liquids and weighed an object in both of them, the liquid that was most dense the object would weigh the least in.
How do you calculate density?
Mass of object/ volume of object
Which two terms can you never use?
Fair test and valid experiment
What is gravity?
A non-contact force that moves between two masses.
What is weight?
A force that measures the effect gravity is having on an object
What is mass?
A measurement of how much of something there is.
6 newtons are how many grams?
600
If someone walked 60 metres in 48 seconds, what is their speed (in m/s)
About 1.25m/s
