Download Formulas velocity(speed) = distance/time a=vf

Formulas
v=d/t
a=vf-vi/t
a=F/m
W=mg
velocity(speed) = distance/time
acceleration =final velocity –initial velocity/time
acceleration = force/mass (or F=ma force=mass x accel.)
weight = mass x gravity (9.8 m/s )
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Prep problems for Unit 8a test (Thu, 2/25) - use your notes and work to do the
following:
1.
2.
3.
4.
5.
6.
7.
In what three ways can something accelerate?
What does positive acceleration mean?
What does negative acceleration mean?
What is the SI unit for acceleration?
What is a force?
What is the SI unit for force?
State Newton’s 1st Law of Motion.
8. What one word can describe the 1st Law?
9. What formula describes Newton’s 2nd Law of Motion?
10. How is MASS different from WEIGHT?
11. In what unit is weight measured in science?
12. What does Newton’s 3rd Law state?
13. What are the action and reaction forces that allow a rocket to launch?
Use the formulas to calculate the following:
14. What is the average speed of a car that travels 250 miles in 4.5 hours?
15.What is the acceleration of a car that goes from 60 mph to 20 mph over 3
seconds?
16-20 on page 2
Formulas
v=d/t
a=vf-vi/t
a=F/m
W=mg
velocity(speed) = distance/time
acceleration =final velocity –initial velocity/time
acceleration = force/mass (or F=ma force=mass x accel.)
weight = mass x gravity (9.8 m/s )
2
16.What is the acceleration of a jet that goes from 120 m/s to 180 m/s over 8
seconds?
17.What is the acceleration of a skateboard that goes from 1 m/s to 4 m/s
over 2 seconds?
18.What would be the acceleration of a 0.15 kg baseball that is hit with a
force of 65 Newtons?
19.What force would result when a 4 kg rock is thrown at an acceleration of 3
m/s2?
20. What is the weight of a 85 kg man on Earth (g= 9.8 m/s2)?