Physics

What is a vector

A quantity that has magnitude and direction

What is a scalar

A quantity that only has magnitude

What is a projectile

An object that is thrown, launched or propelled and moves under the influence of gravity

A projectile shot in a vaccum horizontailly remains horizontal because…

No horizontal forces are being acted on it

If the force of gravity stopped acting on planets

they would move in straight lines tagent to their orbit

Compared to its mass on earth, a 10kg object on the moon would be..

the same because mass is not impacted by gravity, while weight is

Why would something that weighted 1N be larger on the moon than earth

The less gravity present, the greater something will weigh

What is friction

Force that always acts opposite to an object

The the net force of an object the same, more than, or less than it’s weight at freefall

The same because when an object is in free fall Net force = Weight

How can more pressure be exerted to the ground?

Lower surface area means more pressure,

What is the relationship between force and acceleration

when force is doubled, acceleration is doubled

What is the relationship between mass and accerleration

When mass is doubled, acceleration is halved

Is the gravitational force attraction of the earth’s center vs a person the same, more, or less

The force they are both attracted to each other is the same

An object can be set in motion if…

a net force is acting upon the object

What’s newton’s third law of motion

For every action, theres an equal and opposite reaction

When an object is still, its exerted force is…

the same as it’s mass

The momentum change of an object is equal to the…

Impulse acting on it

How do you increase momentum

Increase the force acting on it

The force of a launcher and an object are always…

the same

The impulse of a launcher and an object are always…

the same

A collision is considered elastic if

Theres no lasting deformation

The speed of an object will be the same as the recoil of its launcher if..

the mass of the launcher is equal to the mass of the object

The force of an object depends on.. (3 things)

Speed, impact, and air resistance

what is the unit of work

Joules

What is the unit of power

watts

What is the force relationship between vertical movement and ramp movement

The force required for ramp movement is half than the force required for vertical movement

What is power

the amount of work done over time

An object at rest can always have

energy

IF you spin something with a string and that spring breaks, what happens

It will fly off tangent to it’s circular path

If the mass of the earth increases than the weight will..

increase

If two objects with different masses move towards each other under the influence of the same gravitation, than each of their forces

will be the same

The force of gravity acting on you will increase if

the plan'et’s radius is shrinking

What’s the correlation between radius and gravitational force

the smaller the radius, the larger gravitational pull

Since earth is attracted to the sun, why doesn’t it fall into the sun?

Because the sun has a sufficient tangential velocity

Is someone’s momentum is 3x, than their kenetic energy would be..

9 times because kenetic energy = momentum²