When you pull on a window shade, you exert a(n) _____.
Question 2
2.
A(n) _____ can be used to represent the direction and strength of a force.
Question 3
3.
The strength of a force is measured in _____.
Question 4
4.
The net force determines how and if an object will _____.
Question 5
5.
When two forces act in opposite directions, the object will accelerate in the same direction as the _____ force.
Question 6
6.
A force is described by its _____ and by the direction in which it acts.
Question 7
7.
The law of universal _____ states that the force of gravity acts between all objects in the universe that have mass.
Question 8
8.
As distance increases, gravitational force _____.
Question 9
9.
When you stand on a bathroom scale, it displays the ____ force that Earth is exerting on you.
Question 10
10.
Friction acts in a direction _____ to the direction of the object's motion.
Question 11
11.
When the irregularities of one surface come into contact with those of another surface, _____ occurs.
Question 12
12.
The applied force required to push something across a surface ____ as friction increases.
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Question 17
17.
Question 18
18.
Question 19
19.
Question 20
20.
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Question 25
25.
Question 26
26.
Question 27
27.
Force = 65 kg X 3 m/s2 =
Question 28
28.
A 250 kg trailer is being pulled by a truck. The force causes the trailer to accelerate at 4 m/s2. What is the net force that causes this acceleration?
Question 29
29.
Momentum = 5 kg X 6.5 m/s = (no unit necessary)
Question 30
30.
A 0.14 kg baseball travels at 7 m/s. What is it's momentum? (no unit necessary)
Newton's first law of motion states that an object will not experience a change in motion unless acted upon by a(n) balanced force.
True
False
To increase acceleration of an object, you reduce its mass or increase the applied force.
True
False
Newton's third law of motion states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the same direction
True
False
Resistance to change in motion is called statis.
True
False
Action and reaction forces acting in opposite directions do cancel out because they act on different objects.
True
False
If you lean against a wall, the wall pushes back on you with a(n) weaker force.
True
False
Which of the following, moving at the same speed, would be hardest to stop?
car
fire engine
Frisbee
stroller
Which moving object, in all likelihood, will have the greatest momentum?
volleyball hit by a fourth-grader
volleyball hit by an Olympic volleyball player
volleyball hit by a senior adult
volleyball hit by basketball coach
Which formula is used to calculate momentum?
Momentum = Mass x Speed
Momentum = Weight x Speed
Momentum = Volume x Velocity
Momentum = Mass x Velocity
In which situation does the law of conservation of momentum apply?
in the absence of greatest velocity
in the presence of least velocity
in the absence of outside forces
in the presence of outside forces
The state that exists when the only force acting on an object is gravity is called...
free fall
inertia
acceleration
momentum
The acceleration due to gravity near the surface of Earth is equal to...
9.8 m/s
9.8 kg x m/s
9.8 N
9.8 m/s2
Satellites in orbit around Earth travel in an almost circular path because Earth is...