Mixed Category
Acceleration
The rate of change of velocity
Acceleration toward the center of a curved or circular path
The rate of change of velocity
Which variable is plotted on the X axis of the graph?
speed
time
time
True or False: Objects that change direction are accelerating
True
Velocity
1. Includes the speed of an object and the direction of its motion relative to a reference point
2. Acceleration toward the center of a curved or circular path
2. Acceleration toward the center of a curved or circular path
Which of the following represents the equation used for acceleration?
a = v x t
a= v(f)−v(i)/ t
a= v/t
a= v(f)−v(i)/ t
True or False: An object that is slowing down is also accelerating and explain why when giving your answer
True because it is changing direction
Centripetal acceleration
Acceleration toward the center of a curved or circular path
Includes the speed of an object and the direction of its motion relative to a reference point
Acceleration toward the center of a curved or circular path
Which of the following explain what the variables in the acceleration equation represent?
v(f) = final velocity
v(i) = initial velocity
t = time
2. v(f) = initial velocity
v(i) = final velocity
t = time
v(f) = final velocity
v(i) = initial velocity
t = time
After reading the scenario below, calculate acceleration using the white board
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 10 m/s. But 2 seconds later, at the bottom of the slope, its speed is 24 m/s. What is its average acceleration?
a = 7 kg x m/s2
What does slope represent on a speed time graph?
speed
time
acceleration
acceleration
True or False: Motion can be horizontal, vertical, circular and projectile
True
A car advertisement states that a certain car can accelerate from rest to 60 km/h in 7 seconds. Find the car’s average acceleration.
8.57 kg x m/s2
Which variable is plotted on the Y axis of a speed time graph?
1. speed
2. time
1. speed
True or False: Acceleration does not have a direction and explain why
False, Acceleration does have a direction because for something to accelerate it needs to change direction
A lizard accelerates from 27 m/s to 9 m/s in 3 seconds. What is the lizard’s average acceleration?
6 kg x m/ s2