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PhySci chap 10 Flashcards | StudBud
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PhySci chap 10
PhySci chap 10
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1
Which of the following is
NOT
assistance from a simple machine
Changing the distance of a force
spreads the work over time
Increases work done
multiplying a force
2
The vector representing the change in an object's position is:
velocity
distance
displacement
acceleration
3
Physical qualities having both magnitude and direction are . . .
undirected
director
scalar
vector
4
Physical quantities having magnitude but NOT direction are:
scalar
vector
unidrected
director
5
The acceleration of gravity at the surface of the earth is:
92.2 m/s2
32.2 m/s2
4.9 m/s2
9.81 m/s2
6
Isaac Newton published the laws of motion and universal gravitation in his book . . .
Motivia
Principia
Relativia
Physica
7
What is the actual mechanical advantage when lifting a 400 N box with 100 N of force?
1/4
4
1/8
8
8
In physics, any change in speed, direction or both is this . . .
momentum
inertia
gravitation
acceleration
9
What is the average speed of a car that travels 200 km in 4 hours?
50 km/hr
30 km/hr
20 km/hr
40 km/hr
