Mechanics Flashcards
1
Q
A
2
Q
In real life why does all the kinetic energy in a vehicle travelling on a road,decorating to zero, not get tranferred to potential energy
A
Work is being done against friction / resistive forces
Energy transferred to thermal
3
Q
A
4
Q
A
5
Q
A
A
6
Q
A
7
Q
A
8
Q
A
9
Q
A
10
Q
A
11
Q
A
12
Q
A
13
Q
A
14
Q
A
15
Q
A
D
16
Q
A
Resultant force must equal zero
No moment about any point
Hence answer is B
17
Q
What is terminal velocity
A
The constant velocity reached by an object when the resistive forces balance the driving force
18
Q
Define moment of a point
A
Force x perpendicular distance
Between line of action of force and pivot
19
Q
State principle of moments
A
Sum of clockwise moments is equal to the sum of anticlockwise moments about any given point
For a system in equilbrium
20
Q
A
Power = force x velocity
Force = 190 N
21
Q
A
22
Q
A
23
Q
Is Impulse a vector
A
Yes
24
Q
A
B
25
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27
