part 1 Two crates, one with mass 4.00 kg and the other with mass 6.00 kg, sit on

Question

part 1

Two crates, one with mass 4.00 kg and the other with mass 6.00 kg, sit on the frictionless surface of a frozen pond, connected by a light rope (Figure 1) . A woman wearing golf shoes (so she can get traction on the ice) pulls horizontally on the 6.00 kg crate with a force F that gives the crate an acceleration of 2.30

(a)What is the acceleration of the 4.00 kg crate?

(b)Use Newton's second law to find the tension T in the rope that connects the two crates

(c)Which is larger in magnitude, force T or force F?

(d)Use part (C) and Newton's second law to calculate the magnitude of the force F.

"please clear answers "

part 2

Two boxes, A and B, are connected to each end of a light vertical rope, as shown in the following figure. A constant upward force 90.0 N is applied to box A. Starting from rest, box B descends 10.6 m in 4.20 s. The tension in the rope connecting the two boxes is 34.0 N (Figure 1)

(a)What is the mass of box B?

(b)What is the mass of box A?

"please clear answer"

Explanation / Answer

(a)

As both the crates will move together , acceleration of 4 kg crate is also equal to 2.3 m/s2

(b)

T = 4 * 2.3
= 9.2 N

(d)

F - T = 6 * 2.3
F - 9.2 = 13.8
F = 23 N

c)
So F>T

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