Question

2.
1
A.
2
3
8
1
9
4 5 6 7
time (s)
Fig 23 P

24. The velocity-time graph of an ascending lift is as shown in figure 2.4P. Find the acceleration of the lift () during the first three
seconds. (in during third and sixth second. (i) during the last two seconds.
(Ans. 133 m szero, -2 m 5)
Velocity in km-1
Velocity in m 5-1
60
5
50
4
40
3
30
20
2
A
10
1 2
3
6
2 3
6 7 8 9
4 5
time (h)
4 5
time (h)
Fig 2.4P
Fig 22P
6 CANDID ICSE Physics - 9​

Answer 1

Answer:

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Answer 2

Determine the maximum force P the connection can

support so that no slipping occurs between the plates. There

are four bolts used for the connection and each is tightened

so that it is subjected to a tension of 4 kN. The coefficient of

static friction between the plates is .

SOLUTION

Free-Body Diagram: The normal reaction acting on the contacting surface is equal

to the sum total tension of the bolts. Thus, When the plate is

on the verge of slipping, the magnitude of the friction force acting on each contact

surface can be computed using the friction formula As

indicated on the free-body diagram of the upper plate, F acts to the right since the

plate has a tendency to move to the left.

Equations of Equilibrium:

0.4(16) - p = 12.8 kN

hoping it helps!!