5th Science U 3 Lesson 2/3 - Study Guide

Question 0

Push or pull of an object moving forward

Answer 0

Thrust

Question 1

What are the units of force?

Answer 1

The Newton (N) and the pound (lb.)

Question 2

As the plane moves forward, air moves around the wings and creates a force that raises the plane into the air

Answer 2

Lift

Question 3

Broad, flat surfaces of the plane hit the hair and pull back on the rest of the plane

Answer 3

Drag

Question 4

How does mass and distance affect the gravity between two objects?

Answer 4

Increasing the mass increases the force, and increasing the distance decreases the force.

Question 5

What 2 factors does friction depend on

Answer 5

1) the roughness of the surfaces of the objects

2) how much force is used to push the two objects together

Question 6

What does friction create.

Answer 6

Friction creates heat. (Friction slows down objects for a big events each other and that’s why when you rub your hands together they generate heat)

Question 7

Explain how balanced and unbalanced forces act on an object

We used the example car, bus, ball, rolling pencil.

Answer 7

Balanced forces act on an object without changing its motion. A force that causes an object to change its motion is called an unbalanced force. (Newtons first law of motion: an object at rest tends to stay at rest and object in constant motion tends to stay in motion, unless acted upon by an unbalanced force.)

Question 8

Know the law of inertia: what is needed for an object to change its motion?

Answer 8

An unbalanced force

Question 9

Diagrams: be able to tell which object will experience more friction and Why. Explain how mass and force affect acceleration. What would you have to do to keep constant acceleration of the masses force changed

Answer 9

When we draw diagrams of forces, we often use arrows to represent the direction and the strength of the force

Question 10

What does work effect?

Answer 10

Work affects objects

Question 11

What is the formula for work and how do you calculate it

Answer 11

Force used multiplied by distance when the force was applied

Question 12

What units are work and energy in?

Answer 12

Joules

Question 13

List different forms of potential energy

Answer 13

Chemical potential energy - Energy in the links between Atoms and molecules
elastic potential energy - Energy stored by something that can stretch or compress
gravitational potential energy- The energy and object possesses due to its position above the earth surface

Question 14

List different forms of kinetic energy

Answer 14

Heat - vibration of particles
electricity - kinetic energy of electrons
Sound - Connecticut energy of particles as they move in waves
Light - Connecticut to do that moves in the form of waves

Question 14

If given an example, be able to tell if it is gravitational, elastic or chemical potential energy

Answer 14

X

Question 15

What does the amount of Kinetic energy depend on?

Answer 15

Depends on the objects velocity. (fast-moving bowling ball will cause more pins to fall down than a slow-moving bowling ball faster and object is moving the more kinetic energy and has the amount of kinetic energy also depends on its mass)

Question 16

Explain how an object can change from potential to kinetic energy

Answer 16

Law of Conservation of energy: Energy cannot be created or destroyed it only changes form. Example: The Kinetic energy of falling water is changed into electricity and a Hydro electric dam. Also he works on a loaf of bread and changes it into chemical energy

Question 17

What is periodic motion

Answer 17

And periodic motion energy changes back-and-forth from potential to Kinetic. Just vibrating like a spring is called periodic motion

Question 18

What does the conservation of energy state?

Answer 18

Energy cannot be created or destroyed