What is the formula for average speed?

• Average Speed = Total Distance / Total Time

• Average Speed = Total Time / Total Distance

• Average Speed = Total Distance * Total Time

• Average Speed = Total Time * Total Distance

Answer explanation

The formula for average speed is calculated by dividing the total distance covered by the total time taken. This is depicted by the option 'Average Speed = Total Distance / Total Time'. This formula indicates that speed is directly proportional to distance and inversely proportional to time.

What is distance?

• The measure of how much ground an object has covered during its motion

• The measure of how fast an object is moving

• The duration between two events

• The ability to do work

Answer explanation

Distance is defined as the measure of how much ground an object has covered during its motion. This directly corresponds to the correct option provided. It's not about speed, duration between events or ability to do work, but purely about the ground covered.

What is time?

• The measure of how much ground an object has covered during its motion

• The measure of how fast an object is moving

• The duration between two events

• The ability to do work

Answer explanation

The question asks about the definition of time. While the other options refer to related but different concepts like distance covered, speed of an object, and ability to do work, only one option accurately defines time. Time is correctly defined as 'The duration between two events' which matches with the answer provided.

What is work?

• The measure of how much ground an object has covered during its motion

• The measure of how fast an object is moving

• The duration between two events

• The force acting on an object to move it a certain distance

Answer explanation

Work, in physics, refers to the force exerted on an object to move it over a certain distance. The option 'The force acting on an object to move it a certain distance' accurately describes this concept. The other options refer to different physics concepts: distance travelled, speed, and time duration, which are unrelated to the question asked about 'work'.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the unit of energy in the International System of Units?

• Joules

• Meters

• Seconds

• Newtons

Answer explanation

The unit of energy in the International System of Units is Joules. It's not Meters, Seconds or Newtons. Meters are units of length, seconds are units of time, and Newtons are units of force. Therefore, the correct answer to the question is Joules.

What is energy?

• The measure of how much ground an object has covered during its motion

• The measure of how fast an object is moving

• The duration between two events

• The ability to do work

Answer explanation

Energy is defined as the ability to do work. The given options describe different concepts related to physics. However, the definition of energy aligns with the description 'The ability to do work'. None of the other options correctly define what energy is.

What is a graph?

• A visual representation of data, often displayed on a coordinate plane

• The measure of how fast an object is moving

• The duration between two events

• The ability to do work

Answer explanation

A graph is a visual depiction of data, often presented on a coordinate plane. This means it uses lines, shapes, dots or other graphical elements to represent values, allowing users to easily understand and analyze data. The other options do not fit the definition of a graph. So, the correct answer is 'A visual representation of data, often displayed on a coordinate plane'.

Tags

NGSS.MS-PS3-1

What is a coordinate plane?

• A plane formed by two perpendicular number lines, the x-axis and the y-axis

• The measure of how fast an object is moving

• The duration between two events

• The ability to do work

Answer explanation

A coordinate plane is defined as a plane that is formed by two perpendicular number lines, the x-axis and the y-axis. The other options relating to the measure of speed, duration between two events or the ability to do work, are not relevant in this context.

What is the x-axis?

• The horizontal line on a coordinate plane

• The vertical line on a coordinate plane

• The measure of how fast an object is moving

• The duration between two events

Answer explanation

The x-axis is the horizontal line on a coordinate plane. It acts as a baseline for mapping values. The other options mentioned, like the vertical line on a coordinate plane (which is the y-axis), the measure of how fast an object is moving, and the duration between two events, are not correct. They do not accurately describe what the x-axis is.

What is the y-axis?

• The horizontal line on a coordinate plane

• The vertical line on a coordinate plane

• The measure of how fast an object is moving

• The duration between two events

Answer explanation

The y-axis is the vertical line in a coordinate plane system. It's a fundamental concept in geometry and graphing. The vertical position of a point on a graph represents its value in relation to this y-axis. Hence, the correct answer to the question is that the y-axis is the 'vertical line on a coordinate plane'.