Topicmfa73a5d757d49c40_1528449000663_0Topic

Uniformly accelerated rectilinear motionuniformly accelerated rectilinear motionUniformly accelerated rectilinear motion

Levelmfa73a5d757d49c40_1528449084556_0Level

Second

Core curriculummfa73a5d757d49c40_1528449076687_0Core curriculum

I. The use of physical concepts and quantities to describe phenomena and to indicate their examples in the surrounding reality. The student:

7) names a uniformly accelerated motionuniformly accelerated motionuniformly accelerated motion – a motion in which the speed increases in unit time intervals by the same amount, and a uniformly decelerated motion - a motion in which the speed decreases in unit time intervals by the same amount.

Timingmfa73a5d757d49c40_1528449068082_0Timing

45 minutes

General learning objectivesmfa73a5d757d49c40_1528449523725_0General learning objectives

Defining uniformly accelerated rectilinear motion.

Key competencesmfa73a5d757d49c40_1528449552113_0Key competences

1. Defines uniformly accelerated rectilinear motion.

2. Determines the relationship between quantities describing the movement.

Operational (detailed) goalsmfa73a5d757d49c40_1528450430307_0Operational (detailed) goals

The student:

- defines the concept of uniformly accelerated motionuniformly accelerated motionuniformly accelerated motion,

- determines the dependencies between the quantities describing this motion.

Methodsmfa73a5d757d49c40_1528449534267_0Methods

1. Discussion and brainstorming.

2. Teaching by applying appropriate definitions and relationships.

Forms of workmfa73a5d757d49c40_1528449514617_0Forms of work

1. Individual work.

2. Work with the whole class.

Lesson stages

Introductionmfa73a5d757d49c40_1528450127855_0Introduction

Task 1

Answer the questions.

1. Give the definition of accelerationaccelerationacceleration.
2. Provide a classification of movements due to the shape of the track and the speed value.
3. Give the unit of acceleration.
4. Give examples of motion like in point 2.

Answer.

1. A vector physical quantity whose magnitude is equal to the change of velocity in a unit of time.
2. We can divide motion due to velocity to uniform and non‑uniform, due to the shape of the track, be straight and curved.
3. The unit of accelerationaccelerationacceleration in the SI system is $\left[\frac{m}{s^2}\right]$.
4. Uniform motion, such as the motion of a pedestrian column, motion of the train after reaching the cruising speed, non‑uniform motion is e.g. the motion of the car, the motion of the landing plane. Rectilinear motionrectilinear motionRectilinear motion is, for example, sprinter motion in 100 m, passenger plane motion, curvilinear motion, e.g. bee motion collecting pollen, motion of the chair on the carousel.

Proceduremfa73a5d757d49c40_1528446435040_0Procedure

[Slideshow]

Task 2

Take a look at the pictures and answer the questions.

a) What trajectories can bodies move along?
b) Is the velocity of a body constant or is it changing during motion?
c) Is the accelerationaccelerationacceleration of the body constant or is it changing during motion?

Conclusions:

a) The bodies can move in a straight or curved line.
b) All can move with constant or variable velocity.
c) The bodies may have constant or variable acceleration.

Definition:

a) Uniformly accelerated motion is a motion in which the speed increases in unit time intervals by the same amount.
b) Motion of bodies, which takes place in a straight line with constant acceleration, is called uniformly accelerated rectilinear motion.mfa73a5d757d49c40_1527752256679_0b) Motion of bodies, which takes place in a straight line with constant acceleration, is called uniformly accelerated rectilinear motion.

[Interactive graphics]

Task 3

Determine if the sentences below are true or false.

a) In uniformly accelerated rectilinear motionuniformly accelerated rectilinear motionuniformly accelerated rectilinear motion, the accelerationaccelerationacceleration is constant.
b) The trajectorytrajectorytrajectory of uniformly accelerated rectilinear motion is a straight line.
c) In uniformly accelerated rectilinear motion the velocity is constant.
d) The velocity in uniform rectilinear motionrectilinear motionrectilinear motion increases by a constant amount at equal time intervals.

Answer:

a) True.
b) True.
c) False.
d) False

Lesson summarymfa73a5d757d49c40_1528450119332_0Lesson summary

An accelerated motion is a motion in which we observe an increase in the velocity of a moving body over a period of time. The accelerationaccelerationacceleration magnitude in accelerated motion can change.

Uniformly accelerated motionuniformly accelerated motionUniformly accelerated motion is a motion in which the speed increases by a constant amount at equal time intervals (e.g. every second). The acceleration magnitude in uniformly accelerated motion is constant.

The trajectorytrajectorytrajectory in uniformly accelerated rectilinear motion is a straight line.

Selected words and expressions used in the lesson plan

accelerationaccelerationacceleration

rectilinear motionrectilinear motionrectilinear motion

trajectorytrajectorytrajectory

uniformly accelerated motionuniformly accelerated motionuniformly accelerated motion

uniformly accelerated rectilinear motionuniformly accelerated rectilinear motionuniformly accelerated rectilinear motion