Physics grade 10

Physics is defined as:

• The study of plants, animals, and nature

• Develped out of efforts of man trying to explain our physical environment.

• Developed out of efforts of man trying to understand space and astronomy

• Is the science of the human body

Name 2 famous physicist:

• Dmitri Mendeleev

• sir Isaac Newton

• Galileo Galilei

• Rosalind Franklin

What is the definition of displacement?

• An object that is lost without any scientifically explained reason

• .

  A vector that points from an object's initial position to its funal position and has a magnitude that equals the shortest distance between two points

• A vector that points from an object's initial position to its funal position and has a magnitude that equals the greatest distance between two points

• None of the above

What is the definition of average velocity?

• Average Velocity= displacement ------------------ elapsed time

• Elapsed time= Distance ------------- speed

• Velocity= Elapsed time ----------------- acceleration

• None of the above

______________ does not reveal about the direction of the motion. To describe how fast an object moves and the direction of its motion, we need the vector concept of _____________

• speed , velocity

• distance , time

• speed , time

• displacement, velocity

Power is defined as

• the something that enables an object to do work.

• how much force an object has.

• the rate at which work is done.

• energy due to the position of something.

The product of a force and the length of time the force is applied to an object is called , and it causes a change in its momentum.

• velocity

• interval

• impulse

• work

Tags

NGSS.HS-PS2-2

When an object is in free fall,

• its speed stays the same.

• it decelerates

• it accelerates.

• none of the above.

Tags

NGSS.HS-PS2-1

Energy is frequently defined as the ability to do work.

• true

• false

When light rays strike a surface, they bounce off in a process called

• reflection

• refraction

• interferance

• deffraction

Tags

NGSS.MS-PS4-2