Newton's
1.17kg
What is Newton's third law?
Action = reaction
What is the rule for calculating net force?
Add the same subtract opposite
What is the mass if a 60N force accelerates an object 20 m/s²?
3 kg
Draw a velocity vs time graph for an object stopped, then speeding up, then quickly stopping again.
Various
Describe the motion of an object in equilibrium?
Constant velocity
0 acceleration
What are the two ways to increase the acceleration of an object.
What are the three ways an object can accelerate?
Speed up, slow down, turn
What is the acceleration of an object that goes from 10 m/s to 18 m/s in 2 seconds?
4 m/s²
Draw a picture showing the difference between distance and displacement?
Various
What 5 phrases mean inertia?
constant speed in a straight line
constant velocity
0 net force
0 acceleration
balanced forces
read the sentence backwards
Name 3 vectors?
Force, velocity, acceleration, displacement, momentum
A pitcher throws a baseball at 30 m/s. How long does it take the baseball to go 20m?
0.67 sec
What are the equations for speed, acceleration, and newton's second law?
S=D/T
A=V-V/T
F=MA
What direction does an object accelerate?
The direction of the force
In terms of forces, what are the two ways to have an object move at constant speed in a straight line?
Balanced forces or no forces
Describe the motion of an object NOT in equilibrium?
Accelerating
A bug traveling at 4 m/s begins to accelerate at 4 m/s² for 4 seconds. What is the final speed of the bug?
20 m/s
Draw an acceleration vs time graph for an object in free fall.
Various
Name 2 examples from class of something directly proportional and something inversely proportional?
Direct
-force and acceleration, mass and weight
Inversely
Mass and acceleration, time and speed
What are the action/reaction forces to the weight of an apple?
earth on apple, apple on earth
What are the units for the following terms:
Force, mass, acceleration, weight, speed, time, distance, velocity, and displacement?
F-N
M-kg
A-m/s²
W-N
S-m/s
T-s
D-m
V-m/s
X-m
If 80N of friction accelerates a 40kg object at 1 m/s², what must the applied force be?
120N
Draw a force diagram for a 6kg moving to the right at constant speed against 4N of friction.