Question

Can someone please explain to me about:

Deceleration
A) Deceleration is the rate of slowing down, measured in m/s².
B) Deceleration is the opposite of acceleration, signifying an increase in speed.
C) Deceleration is a constant speed with no change in velocity.
D) Deceleration is the force acting on an object due to gravity.

First equation of linear motion
A) The first equation of linear motion describes how an object's speed changes over time.
B) The first equation of linear motion is about calculating displacement when acceleration is constant.
C) The first equation of linear motion relates velocity, initial velocity, acceleration, and time.
D) The first equation of linear motion is used to calculate the area under a velocity-time graph.

Answer 1

Deceleration is the rate at which an object slows down, measured in m/s² and is essentially acceleration in the opposite direction of velocity. The first equation of linear motion relates velocity, initial velocity, acceleration, and time, describing how an object's speed changes when the acceleration is constant.

Step-by-step explanation:

Deceleration is the rate of slowing down of an object, which is measured in meters per second squared (m/s²). It is actually acceleration with a direction opposite to the velocity of the object. When an object experiences deceleration, its speed decreases over time. Therefore, the correct answer for the definition of deceleration is: A) Deceleration is the rate of slowing down, measured in m/s².

The first equation of linear motion is one of the kinematic equations and it relates velocity, initial velocity, acceleration, and time. If we assume velocity to be the final velocity (v), initial velocity to be (u), acceleration (a), and time (t), the equation can be expressed as v = u + at. In other words, it captures how the velocity of an object changes over a certain period of time when the acceleration is constant. Hence, the correct answer for the first equation of linear motion is: C) The first equation of linear motion relates velocity, initial velocity, acceleration, and time.