Kinetics, the study of unbalanced forces causing motion, can be analyzed by three methods: inertia force or torque (dynamic equilibrium), work and energy, and impulse and momentum.Consider the...

1 answer below »

View more »
Answered 2 days AfterFeb 15, 2023

Answer To: Kinetics, the study of unbalanced forces causing motion, can be analyzed by three methods: inertia...

Baljit answered on Feb 15 2023
53 Votes
Questions
13–1.
Determine the acceleration of the 150-lb block in Figure P13–1 if the coefficient of kinetic friction is 0.4.
Answer:--
A force of 90lbs at a an
gle of 45degre downward the horizontal
F1x = 90 cos45 = 63.64 lbs
F2y = 90 sin45 = 63.64 lbs
Other force 60 lbs upwards at angle of 30 degrees to horizontal
so horizontall component
F2x = 60cos30 = 51.96 lbs
F2y = 60 sin30 = 30 lbs upwards
and thers is two other forces are also there one is normal force N and other its weight 150lb . Normal force N s in upward direction and weight is in downward direction .
there will be a friction force in horizontal µN in oppsite direction of force .
so now in vertical direction
N + 30 = 150 + 63.64
N = 183.64 lbs
in horizontal direction:
F1x +F2x - µN = Ma
63.64 + 51.96 - 0.4 X 183.64 = Ma
Ma = 42.14
a = 42.14/(150 X g) = 0.281g = 0.281 X 32.2 = 9.05 ft /sec2
13–3.
A 130-kg cart is accelerated horizontally by a 250-N force pulling at an angle of 20° above horizontal. Neglecting rolling resistance, determine the acceleration of the cart.
Answer:-
Free Body diagram of the Cart is as following
Now apply force equilibrium on Horizontal Direction.
i.e Fx-ma=0
ma=250cos20
a=250cos20/m=250 cos20/130=1.8 m/sec2
13–7.
At what maximum acceleration rate can a 500-N test-strength cable lift a 40-kg mass?
Answer:-
Free Body diagram of scenerio is as following
Now m=40Kg
W=m*g=40*9.81=392.4N
Apply Force equilibrium in Vertical Direction
T-W-ma=0
a=(T-W)/m=(500-392.4)/40=2.69 m/sec2
13–8.
What force does a 180-lb man exert on the floor of an elevator that is moving downward and decelerating...
SOLUTION.PDF

Answer To This Question Is Available To Download

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here
April
January
February
March
April
May
June
July
August
September
October
November
December
2025
2025
2026
2027
SunMonTueWedThuFriSat
30
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
00:00
00:30
01:00
01:30
02:00
02:30
03:00
03:30
04:00
04:30
05:00
05:30
06:00
06:30
07:00
07:30
08:00
08:30
09:00
09:30
10:00
10:30
11:00
11:30
12:00
12:30
13:00
13:30
14:00
14:30
15:00
15:30
16:00
16:30
17:00
17:30
18:00
18:30
19:00
19:30
20:00
20:30
21:00
21:30
22:00
22:30
23:00
23:30