A 10-m long steel wire (cross

1
A 10-m long steel wire (cross section 1cm2.
Young's modulus 2 x 1011 N/m2) is subjected to a
load of 25.000 N . How much will the wire stretch
under the load? Select the correct answer.

1. 1.25 cm
2. 0.8 cm
3. 2.25 cm
4. 0.1 cm
5. 12.5 cm

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 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
2
A uniform beam having a mass of 50 kg and a
length of 2.7 m is held in place at its lower
end by a pin. Its upper end leans against a
vertical frictionless wall as shown in the
figure. What is the magnitude of the force the
pin exerts on the beam?
Select
the correct answer.

1. 0.57 kN
2. 0.66 kN
3. 0.39 kN
4. 0.84 kN
5. 0.93 kN

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 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
3
How large a pressure increase (in ATM ) must be
applied to water if it is to be compressed in
volume by 3? The bulk modulus of water is 2 x
109 N/m2 and 1ATM 105 N/m2 Select the correct
answer.

1. 600 ATM
2. 570 ATM
3. 640 ATM
4. 60 ATM
5. 6.000 ATM

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 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
4
How large a force is necessary to stretch a 1 -
mm diameter copper wire (Y 11 x 1010 N/m2) by
2? Select the correct answer.

1. 1.728 N
2. 2.028 N
3. 1.328 N
4. 173 N
5. 17.280 N

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 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
5
A horizontal meter stick supported at the 50 - cm
mark, has a mass of 0.20kg hanging from it at
the 10 - cm mark and a 0.20 kg mass hanging from
it at the 80 - cm mark. Determine the position
on the meter stick at which one would hang a
third mass of 0.50 kg to keep the meter stick
balanced. Select the correct answer.

1. 54 cm
2. 49 cm
3. 64 cm
4. 69 cm
5. 74 cm

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 31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50