LINEAR MOTION. Chapter 2. Motion . Everywhere – people, cars, stars, cells, electricity, electrons Rate = Quantity/time How fast something happens. Linear Motion. Motion on a straight path Scalar- Distance and speed Vector – Displacement and velocity. Motion is Relative.
The longer the time period measured, the more it leads to calculating an average velocity.
Chapter calculating an average velocity.Chapter Assessment Questions
Refer the adjoining figure and calculate the distance between the two signals?
Chapter calculating an average velocity.
2Chapter Assessment Questions
Reason:Distance d = df – di
Here, df = 8 m and di = 3 m
Therefore, d = 8 m 3 m = 5 m
Δl = l f – l i
Δt = t f -t i
v = Δl = l f – l i
Δt t f - t i
a – acceleration (m/s^2)
v – velocity (m/s)
t – time (s)
Problem – What is the acceleration of a car the screeches to a stop from 96.54 km/h in 3.7 seconds?
Slope = acceleration
Mean speed = vav = ½ (vi + vf)
Area of a retangle = m/s x s = Meters
s = ½ (vi + vf) t
Problem- A bullet is fired with a muzzle speed of 330m/s down a 15.2 cm barrel. How long does it take to travel down the barrel?
Problem – What is the cheetah’s acceleration if it goes 0 to 72 km/hr in 2.0 seconds?
- How far will it go to be moving 17.9 m/s?
Elapsed Time Instant. Speed (m/sec)
= 10 m/s/s = m/s2
Unit – meter/second/second
speed time interval
V instantaneous = at
vinstantaneous = gt
distance = ½ gravity x time2
d= ½ gt2
Linear - directly proportional
Slope is constant = acceleration
Slope is variable = Speed