1. A 10-m long steel wire (cross – section 1cm 2. Young's modulus 2 x 10 11 N/m 2 ) is subjected to a load of 25.000 N. How much will the wire stretch under the load? Select the correct answer. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.1.25 cm 2.0.8 cm 3.2.25 cm 4.0.1 cm 5.12.5 cm

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. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.0.57 kN 2.0.66 kN 3.0.39 kN 4.0.84 kN 5.0.93 kN

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 10 9 N/m 2 and 1ATM = 10 5 N/m 2 Select the correct answer. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.600 ATM 2.570 ATM 3.640 ATM 4.60 ATM 5.6.000 ATM

4. How large a force is necessary to stretch a 1 - mm diameter copper wire (Y = 11 x 10 10 N/m 2 ) by 2%? Select the correct answer. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.1.728 N 2.2.028 N 3.1.328 N 4.173 N 5.17.280 N

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. 1234567891011121314151617181920 2122232425262728293031323334353637383940 41424344454647484950 1.54 cm 2.49 cm 3.64 cm 4.69 cm 5.74 cm