If the distance between two objects is doubled, the gravitational force between them will:

decreased to One-fourth as large

Define Uniform circular motion

motion in a circle path, uniform velocity, changeable direction

Compare between acceleration and centripetal acceleration

acceleration changes in velocity centripetal acceleration changes in direction of velocity

A cyclist rounds a circular curve of radius 50 meters at a speed of 5 m/s. • a) What is the centripetal acceleration? b) What would happen to the required centripetal force if the cyclist increased their speed to 10 m/s

a c = v 2 /r =0.5 m/s 2 force increase 4 times

What happens to the direction of velocity when an object moves in uniform circular motion?

moves in uniform velocity and changeable direction

prevent motion When you are hiking in the woods

sliding over When you write with a pencil. The pencil “lead” slides easily over the paper

liquid and gases When you tried to push your open hand through the water in a tub or pool

The factors affecting the frictional force:

a) The force with which the two surfaces (b)The nature of the two surfaces (c) The angle and position of the object.

is the property responsible for resisting the relative motion of liquid layers

The most viscous liquid :

it flows slowly and offer high resistance to the movement of objects in it .

The least viscous liquid

it flows quickly and offer little resistance to the movement of objects in it

The factors on which the viscosity coefficient of a liquid depends:

1) The type of liquid. 2)The temperature.

The factors affecting the viscosity forces

directly proportional to the speed (v) directly proportional the area of the movable plate (A) inversely proportional to the distance between the two plates (d).

Physics Flashcards

Student preview

32 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Force

Back

an external effect

that affect in object...

2.

FLASHCARD QUESTION

Front

Equivalent unit for Newton

Back

Kg.m/s²

3.

FLASHCARD QUESTION

Front

Types of force

Back

contact-non contact

4.

FLASHCARD QUESTION

Front

A 1500 kg car is moving at a constant velocity. What is the net force acting on the car?

Back

Force equal zero

5.

FLASHCARD QUESTION

Front

What force is required to accelerate a 750 g object at 6 m/s²?

Back

4.5 N

6.

FLASHCARD QUESTION

Front

Gravitational force between two objects is inversely proportional to:

Back

Distance square

7.

FLASHCARD QUESTION

Front

Gravitational force between two objects is directly proportional to:

Back

product of masses

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