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This free online velocity calculator determines the final velocity (v), initial velocity (u), acceleration (a), or time (t) using the velocity formula. You can calculate the final velocity (v) with the equation v = u + at.
Final velocity
v = 604 m/s
Understanding the principles of motion is fundamental in physics. The equations of motion describe how objects move under the influence of different forces. These equations are essential in solving problems related to velocity, acceleration, displacement, and time.
The three primary equations of motion are as follows:
Where:
The first equation of motion is given as:
v = u + at
This equation states that an object's final velocity (v) is equal to its initial velocity (u) plus the product of acceleration (a) and time (t). It assumes that acceleration remains constant throughout the motion.
Each component of this equation plays a crucial role in understanding motion:
The first equation of motion is widely used in physics and engineering. Below are some of its real-world applications:
In physics, projectiles such as a thrown ball or a launched rocket obey the laws of motion. By using the first equation, we can determine how fast an object moves at any given time after being projected.
Engineers use the equation v = u + at to calculate how quickly a car can accelerate from rest. This is critical in vehicle design to improve fuel efficiency and safety.
The motion of waves, including sound waves and ocean waves, follows the first equation of motion. Scientists use this to predict wave speed and behavior under different conditions.
Let's calculate the final velocity of an object using the first equation of motion.
Example: A cyclist starts with an initial velocity of 6 m/s and accelerates at 0.6 m/s² for 20 seconds. What will be the final velocity?
Using v = u + at:
v = 6 + (0.6 × 20) = 6 + 12 = 18 m/s
We can rearrange the equation to find initial velocity:
u = v - at
Example: A car reaches a velocity of 25 m/s after accelerating at 2 m/s² for 10 seconds. What was its initial velocity?
u = 25 - (2 × 10) = 25 - 20 = 5 m/s
To find acceleration, we rearrange the equation as:
a = (v - u) / t
Example: A car's velocity increases from 0 to 100 km/h in 2.5 seconds. Convert 100 km/h to m/s: 100 km/h = 27.78 m/s.
a = (27.78 - 0) / 2.5 = 11.11 m/s²
The formula to calculate time is:
t = (v - u) / a
Example: A car decelerates from 60 mph (26.82 m/s) to 20 mph (8.94 m/s) with acceleration -2 m/s².
t = (8.94 - 26.82) / -2 = 8.94 seconds
The concept of motion has been studied for centuries. Ancient Greek philosophers like Aristotle first proposed theories of motion, but it was Galileo Galilei and Sir Isaac Newton who established the mathematical foundation.
Galileo discovered that acceleration due to gravity is constant, which laid the groundwork for Newton's laws. Newton’s second law (F = ma) led to the derivation of the first equation of motion.
The first equation of motion, v = u + at, is essential in understanding movement. It allows us to calculate velocity, acceleration, and time for objects in motion. Whether analyzing car acceleration, projectile motion, or wave behavior, this equation is a crucial tool in physics and engineering.