Elasticity - Jamb Physics Past Questions and Answers

Question 21:

• JAMB 2009

The diagram above represents the graph of the force F applied in stretching a spiral spring against the corresponding extension (X). The force constant of the spring is

A. 20 Nm^-1
B. 40 Nm^-1
C. 30 Nm^-1
D. 10 Nm^-1

Question 22:

• JAMB 2010

If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire

A. 0.75 J
B. 7.50 J
C. 75.00 J
D. 750.00 J

Question 23:

• JAMB 2010

If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire

A. 0.75 J
B. 7.50 J
C. 75.00 J
D. 750.00 J

Question 24:

• JAMB 2011

A copper wire was subjected to a tensile stress of 7.7 x 10⁷ x 10 Nm^-2. calculate strain of the wire.
[young modules = 1.1 x 10¹¹ Nm^-2]

A. 2. 0 x 10^-5
B. 7.0 x 10^-3
C. 7.0 x 10^-4
D. 2.2 x 10^-4

Question 25:

• JAMB 2012

If the stress on a wire is 10⁷NM^-2 and the wire is stretched from its original length of 10.00 cm to 10.05 cm. The young's modulus of the wire is

A. 5 . 0 x 10⁴ Nm^-2
B. 5 . 0 x 10⁵ Nm^-2
C. 2 . 0 x 10⁸ Nm^-2
D. 2 . 0 x 10⁹ Nm^-2