kinetic energy
Presentation
•
Physics
•
10th - 12th Grade
•
Practice Problem
•
Hard
Matthew Everest
Used 12+ times
FREE Resource
8 Slides • 8 Questions
1
kinetic energy
by Matthew Everest
2
3
Multiple Choice
What is the change in kinetic energy of a 10kg toy starting at rest and accelerating to 2m/s?
40J
20J
-20J
-40J
4
energy can be measured in different units
5
Multiple Choice
How many joules of energy is there in a big mac of 540 calories? (see conversion on previous slide)
2.26 J
2.26 million joules
2226 joules
226J
6
Kinetic Energy is a scalar (has no direction)
No types of Energy have a direction so all are scalars.
Any one object cannot have negative kinetic energy.
The lowest value an object can have is 0 if it is not moving.
Remember if a number has a direction it is a vector
7
Fill in the Blanks
Type answer...
8
kinetic energy in more than one dimension
If an object is moving through a 3 dimensional space then we can split the velocities into x ,y and z components.
vz is how much of the velocity is in the z direction
vy is how much of the velocity is in the y direction
vx is how much of the velocity is in the x direction
9
The kinetic energy equation in 3 Dimensions.
10
Example
A 0.4kg football is corner kicked. The ball iniailly moves up with a vy = 7m/s, it moves forwards towards the goal with a vz = 12m/s, and It curls to the left with vx = 1m/s. What is the total kinetic energy of the ball?
11
Multiple Choice
The velocity of a boat moving across the water in the x direction is 8 m/s. The boat also moves at 3m/s in the z direction at the same time. What is the total kinetic energy of the boat if it has a mass of 40000kg? (remember 1 MJ = 1000000J)
1.152J
1.46MJ
1152000J
1152MJ
12
Multiple Choice
The boat from the previous question was moving in how many dimensions?
1
2
3
4
13
Work done , W
14
Multiple Choice
Find the mass of a ball that speeds up t 5m/s speed from rest after 100J of work is done on the ball.
1.1kg
1.4kg
8.6kg
2.8kg
15
Multiple Choice
The work done on an object is equal to the change in kinetic energy. How much work is done on a 2000kg car to accelerate it from rest to 20m/s?
4000J
40J
400000J
4J
16
Multiple Choice
The work done on an object is equal to the change in kinetic energy. How much work is done by the brakes on a 2000kg car to slow it down to stop it?
(work done can be minus)
-400000J
-4000J
400000J
20000J
kinetic energy
by Matthew Everest
Show answer
Auto Play
Slide 1 / 16
SLIDE
Similar Resources on Wayground
13 questions
Color
Presentation
•
10th - 12th Grade
13 questions
Kinematic Graph Review
Presentation
•
10th - 12th Grade
11 questions
Logarithms to Exponential
Presentation
•
10th - 12th Grade
10 questions
Estructura 4.2: stem changing verbs
Presentation
•
10th - 12th Grade
10 questions
The environment
Presentation
•
10th - 12th Grade
13 questions
Unit 1 Exam Review
Presentation
•
10th - 12th Grade
12 questions
Ocean Circulation and Climate
Presentation
•
10th - 12th Grade
13 questions
Ilmu Pengetahuan Alam
Presentation
•
KG
Popular Resources on Wayground
24 questions
PBIS-HGMS Day 10
Quiz
•
6th - 8th Grade
10 questions
HCS SCI 03 Summer School Review 3
Quiz
•
3rd Grade
11 questions
Home Scope
Quiz
•
7th - 8th Grade
15 questions
HCS SCI 05 Summer School Assessment 3 Review
Quiz
•
5th Grade
35 questions
Lufkin Road Middle School Student Handbook & Policies Assessment
Quiz
•
7th Grade
18 questions
Geo 11.3 Area of Circles and Sectors
Quiz
•
9th - 11th Grade