Question

What are the units for distance, time, and speed?

A) Distance: meters, Time: seconds, Speed: meters per second
B) Distance: kilometers, Time: hours, Speed: kilometers per hour
C) Distance: miles, Time: minutes, Speed: miles per minute
D) Distance: feet, Time: hours, Speed: feet per hour
What is the unit for acceleration?
A) meters per second squared
B) kilometers per hour squared
C) miles per hour squared
D) feet per second squared
What is the relationship between acceleration and speed?
A) Acceleration is the rate of change of speed.
B) Acceleration is the total distance covered.
C) Acceleration is the average speed.
D) Acceleration is a constant value.
What is the unit for force? How do you define it?
A) Newton (N), defined as the force required to accelerate a mass of 1 kilogram at a rate of 1 meter per second squared.
B) Joule (J), defined as the energy transferred when a force of 1 newton displaces an object by 1 meter.
C) Pascal (Pa), defined as one newton per square meter.
D) Watt (W), defined as the rate of doing work or transferring heat.

Answer 1

The units for distance can vary (meters, kilometers, miles, feet), and time is measured in seconds, hours, or minutes. Speed is measured as distance divided by time. Acceleration, which is the rate of change of velocity, has a unit of meters per second squared (m/s²), and force is measured in Newtons (N).

Step-by-step explanation:

Units of Distance, Time, and Speed

Units for distance can be meters, kilometers, miles, or feet, depending on the context. Time units include seconds, hours, minutes, and similar temporal measures. When it comes to speed, it's a measure of distance over time, such as meters per second (m/s), kilometers per hour (km/h), miles per minute, or feet per hour.

Unit for Acceleration

Acceleration is the rate of change of speed, and its unit in the International System of Units (SI) is meters per second squared (m/s²). This unit indicates how many meters per second the velocity changes every second.

Relationship Between Acceleration and Speed

Acceleration is indeed the rate at which velocity changes over time. It can be a change in the magnitude of the speed, a change in direction, or both. Therefore, acceleration is not just a simple derivative of speed; it also considers the vector nature of velocity.

Unit for Force and Its Definition

The unit for force is the Newton (N), which is defined as the force required to accelerate a mass of 1 kilogram at a rate of 1 meter per second squared (1 m/s²).