PHYSICS HIGH SCHOOL

Two technicians are discussing hydraulics. Technician A says that if pistons of the same size are used, motion and force can be increased or decreased. Technician B says that if a small piston acts upon a larger piston, the force of the larger piston will increase, but the distance it travels will decrease. Who is correct? A. Technician B only B. Technician A only C. Both Technician A and B D. Neither Technician A nor B

Answers

Answer 1
Answer:

the correct option is A. Only technician B is correct.

Hydraulics works on the pascal law, which states that in a direction the hydro static fluid pressure remains constant.

Px=Py=Pz

Since small piston has small area compare to the large piston

Pbig=Psmall

Fbig/Abig=Fsm/Asm

Fbig=(Abig)/(Asmall)*Fsmall

thus the force on the large piston will increase, but it travel small distance.

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Answers

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If a grocery cart with a mass of 16.5 kg accelerates at +2.31 m/s2 against a frictional force of -15.0 N, what is the applied force?

Answers

Call the applied force 'A'. (Clever ?)

The forces on the cart are  'A' forward and 15 N backward.

The net force on the art is (A-15) forward.

F = m a

Net forward force = (mass of the cart) x (its forward acceleration)

(A - 15) = (16.5) x (2.31)

A - 15 = 38.115

Add 15 to each side:

A = 53.115 newtons
2th Law of Newton:

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What is the difference between mechanical waves and electromagnetic waves?

Answers

Answer:

D. A mechanical wave travels through matter, while an electromagnetic wave travels through empty space.

Explanation:
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Answers

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Answers

Since the ball is free-falling, you use this equation:
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Plugging in the values and converting ft to m,
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v = 8.4 m/s

8.4 m/s have a nice day

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Answers

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