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Physics

Cloyd Tremblay

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2021-10-09 18:35:10
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Cards in this guide (24)
Equation of average speed

Average speed is (Position2 - position1)/time.

Newtons first law of motion states

Newtons first law of motion states that an object in motion will stay in motion and an object at rest will say at rest.

What kind of friction occurs as a fish swims through water

fluid friction.

The acceleration due to gravity on the surface of mars is about one third the acceleration due to gravity on earth's surface the weight of a space probe on the surface of mars is about

One third its weight on earth's surface

A car travels 60 km in the first 2 hours and 68 km in the next 2 hours. What is the car's average speed

32 km/h

A box with a force of 60 N to the right and with a force of 70 N to the right If the force of sliding friction on the box is 120 N what is the net force on the box

the difference is 10

because 60

+ 70

130

- 120

10= friction

When your mass increases what happens to your weight

If your mass increases, your weight also increases.

A ball is rolled uphill a distance of 3 meters before it slows stops and begins to roll back the ball rolls downhill 6 meters before coming to a rest against a tree what is the magnitude of the balls

The magnitude of the balls displacement is 9 meters.

What is the total displacement of a child who walks 4 m South 2 m North 5 m South and 5 m North

2 m south

Which is at rest relative to a seated passenger in a moving car

the seat

How does a projectile differ from an object in free fall

A projectile has an initial forward velocity.

Which word equation is used to calculate the acceleration of an object

Acceleration is "force divided by mass" or "change in velocity with respect to change in time".

What effect does an unbalanced force have on an object

An unbalanced force can completely destroy the object (depending upon its mass and power of force) or can gradually move it or it can also have no effect on the object.

What is the net force acting on a falling object when it reaches terminal velocity

An object falling at terminal velocity is moving at constant speed (that's what terminal velocity means) and we will assume it is not changing direction (i.e. it is falling straight down; in reality it is more likely to be bobbing and weaving on the wind.) Constant speed and direction is another way of saying constant velocity. when an object is acted upon by a net force, it's velocity changes. So, since we know that the velocity is not changing, there is no force.

For an object moving in a circular path which quantity is always changing

velocity.

Which factor determines how fast a butterfly is moving

its size.

Which gives you a frame of reference for your speed when riding in a train

the sky overhead

Which describes a force acting on an object

a ball that moves when kicked

Which is a characteristic of projectile motion

It has variable acceleration

What is a cars acceleration if it increases its speed from 5 m s to 20 m s in 3 s

It accelerates at a speed of 5m/s

What describes the effects of forces on an object

Isaac Newton defines force as mass times acceleration.

Why does an object have a different weight on the moon than it does on Earth

the earth and moon have different values for the acceleration due to gravity.

A tow truck exerts a net horizontal force of 1050 N on a 760-kg car. What is the acceleration of the car during this time

You need to apply Newton's Second Law, which in this case simply means, divide the force by the mass. The answer will be in meters per second squared.

What is the frame reference for a plane moving at 500 kmh

The ground

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