
Newton's Second Law Notes
Presentation
•
Science
•
8th Grade
•
Practice Problem
•
Hard
+2
Standards-aligned
Chelsea McBride
FREE Resource
16 Slides • 22 Questions
1
Open Ended
A mother and daughter press their hands together and then push apart while ice skating.
Immediately after they push away from each other, how does the motion of the mother and daughter differ? Please use the RACE strategy.
2
3
Fuerza: Un empujón o un tirón sobre un objeto.
Masa: La cantidad de materia en un objeto.
Aceleración: la velocidad a la que un objeto cambia de velocidad o dirección
4
FÓRMULA: F=ma
*La fuerza se mide en Newtons (N)
5
Fill in the Blanks
Force is measured in
6
Multiple Choice
What is the formula for calculating force?
F = ma
F = mv
F = mg
F = m/a
7
Fill in the Blanks
A sledgehammer has a mass of 3.5 kilograms. What net force, to the nearest whole newton, will a person need to apply to accelerate the sledgehammer at a rate of 4.0m/s2?
Type answer...
8
Multiple Choice
Why is Newton's Second Law of Motion important in understanding how objects move?
It explains why objects stay at rest.
It helps us predict how objects will accelerate when a force is applied.
It describes how gravity works.
It tells us why objects float.
9
La aceleración es un cambio en el movimiento;
10
La aceleración es un cambio en el movimiento;
cada vez que un objeto acelera,
11
La aceleración es un cambio en el movimiento;
cada vez que un objeto acelera,
se ralentiza,
12
La aceleración es un cambio en el movimiento;
cada vez que un objeto acelera,
se ralentiza,
o cambia de dirección.
13
Multiple Select
Acceleration can occur when an object:
Speeds up
Slows down
Changes direction
Stays at rest
14
15
Multiple Select
Which of the following are examples of acceleration?
A car speeding up
A person walking at a constant speed
A ball slowing down
A cyclist turning a corner
16
Open Ended
Explain what is meant by acceleration in your own words.
17
Cuanto mayor sea la masa de un objeto, mayor será la fuerza necesaria para acelerarlo (ponerlo en marcha, detenerlo, aumentar su velocidad, disminuir su velocidad o cambiar su dirección).
18
Fill in the Blanks
The greater the mass of an object, the more
Type answer...
19
20
Multiple Choice
What happens to the force required to accelerate an object as its mass increases?
The force required increases
The force required decreases
The force required stays the same
The force required becomes zero
21
22
23
Multiple Choice
Which rolling rock will be harder to stop?
The larger rock
The smaller rock
Both are equally hard to stop
Neither can be stopped
24
Open Ended
Explain why it is harder to stop a larger rolling rock compared to a smaller one.
25
26
Multiple Choice
A person is trying to push a large truck and says, 'I need help.' What does this suggest about the relationship between mass and force?
More mass requires more force to move
Less mass requires more force to move
Mass does not affect the force needed
Force is not related to mass
27
28
Open Ended
Compare the effort needed to push a real truck versus a toy truck. Why is there a difference?
29
Cuanto mayor sea la fuerza aplicada a un objeto, mayor será su aceleración. (Cuanto más fuerte patees una pelota, más lejos llegará).
30
31
Open Ended
Reflecting on today's lesson, what questions do you still have about force, mass, or acceleration?
32
Open Ended
Explain how the mass of an object affects the amount of force needed to accelerate it, using an example from everyday life.
33
Multiple Choice
According to Newton's Second Law of Motion, what will happen if you apply a greater force to an object?
It will accelerate more
It will slow down
It will not move
It will change color
34
Multiple Choice
Carts of different masses are pulled along a flat surface. The table shows some variables for each cart.
Which two carts experience the same net force?
Carts 1 and 2
Carts 1 and 3
Carts 2 and 3
Carts 2 and 4
35
Multiple Choice
Four students designed and built air propelled rockets that were lauched into the air. Their data are recorded in the table.
Which rocket had the greatest acceleration?
Rocket 1
Rocket 2
Rocket 3
Rocket 4
36
Multiple Choice
How does Newton's Second Law of Motion relate force, mass, and acceleration?
Force equals mass times acceleration.
Force equals mass divided by acceleration.
Force equals acceleration divided by mass.
Force equals mass plus acceleration.
37
Multiple Choice
The diagram shows a duck swimming in a stream in the opposite direction the stream is flowing. The duck pushes against the water, so the water pushes the duck forward with 20 newtons of force. The water also exerts 15 newtons of resistive forces against the duck.
Which statement best describes the resulting motion of the duck?
The duck will stop moving.
The duck will stop and then start moving again.
The duck will continue moving in its current direction.
The duck will move in the direction that the stream is flowing.
38
Open Ended
Bonus: How do the concepts of force, mass, and acceleration work together to explain the motion of objects? Please answer using the RACE strategy.
A mother and daughter press their hands together and then push apart while ice skating.
Immediately after they push away from each other, how does the motion of the mother and daughter differ? Please use the RACE strategy.
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