Please reduce the size of your images.Darth Frodo said:Homework Statement
5. An object is thrown vertically upwards with a speed of 72 kilometres per hour. How long does it take to reach a point 25 meters below the starting point? You can take g as 10 ms-2 for convenience.
Here is my answer. I got 4 yet the answer is 5.
[IMG ]http://i.imgur.com/Ewvwh.jpg[/PLAIN]
[IMG ]http://i.imgur.com/ynVmM.jpg[/PLAIN]
[IMG ]http://i.imgur.com/OBVsX.jpg[/PLAIN]
Am I correct?
Homework Statement
Homework Equations
The Attempt at a Solution
Kinematics in 1D is a branch of physics that deals with the study of motion in one dimension, typically along a straight line. It involves analyzing the position, velocity, and acceleration of an object in motion.
Distance is the total length covered by an object in motion, while displacement is the shortest distance between the initial and final position of the object. Displacement takes into account the direction of motion, while distance does not.
Velocity is the rate of change of displacement with respect to time, while speed is the rate of change of distance with respect to time. Velocity also takes into account the direction of motion, while speed does not.
Average acceleration is the change in velocity over a certain period of time, while instantaneous acceleration is the acceleration at a specific moment in time. Average acceleration is calculated by dividing the change in velocity by the change in time, while instantaneous acceleration is calculated using calculus.
The mass of an object affects its motion in 1D by determining how much force is needed to accelerate the object. Objects with larger masses require more force to accelerate, while objects with smaller masses require less force. In 1D motion, mass also affects an object's inertia, or its resistance to changes in motion.