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Biology

2016, Grade-12 Chem. Practice Questions

Physics
Hooke’s Law -Multiple Choice Questions

Question 1: Hooke's Law states that the force exerted by a spring is proportional to its __?
(a) length (b) width
(c) mass (d) displacement

✓ Correct: d) According to Hooke's Law, the force exerted by a spring is directly proportional to the displacement or deformation of the spring from its equilibrium position.

Question 2: Hooke's Law applies to which type of materials?
(a) elastic materials (b) plastic materials
(c) brittle materials (d) ductile materials

✓ Correct: a) Hooke's Law is applicable to elastic materials, which are those materials that can return to their original shape and size after being deformed under a certain amount of stress.

Question 3: The proportionality constant in Hooke's Law is called the _?
(a) spring constant (b) elastic modulus
(c) stress (d) strain

✓ Correct: a) The proportionality constant in Hooke's Law is also known as the spring constant. It represents the stiffness of the spring and is usually denoted by the letter k.

Question 4: According to Hooke's Law, if the displacement of a spring is doubled, the force exerted by the spring will __?
(a) also double (b) be halved
(c) remain the same (d) be quadrupled

✓ Correct: a) Hooke's Law states that the force exerted by a spring is directly proportional to the displacement or deformation of the spring from its equilibrium position. Thus, if the displacement of the spring is doubled, the force exerted by the spring will also double.

Question 5: Hooke's Law can be used to calculate the __ of a spring?
(a) length (b) width
(c) mass (d) spring constant

✓ Correct: d) Hooke's Law can be used to calculate the spring constant of a spring. The spring constant represents the stiffness of the spring and is a measure of the force required to stretch or compress the spring by a certain distance.


Question 6: A spring has a spring constant of 50 N/m. If a force of 10 N is applied to the spring, what is the displacement of the spring?
(a) 0.2 m (b) 0.4 m
(c) 0.6 m (d) 0.8 m

✓ Correct: a) According to Hooke's Law, F = kx, where F is the force applied to the spring, k is the spring constant, and x is the displacement of the spring. Rearranging this equation to solve for x, we get x = F/k = 10 N / 50 N/m = 0.2 m.

Question 7: A spring is stretched 0.2 m by a force of 40 N. What is the spring constant of the spring?
(a) 8 N/m (b) 20 N/m
(c) 40 N/m (d) 200 N/m

Answer d) According to Hooke's Law, F = kx, where F is the force applied to the spring, k is the spring constant, and x is the displacement of the spring. Rearranging this equation to solve for k, we get k = F/x = 40 N / 0.2 m = 20 0N/m.

Question 8: A spring is compressed by 0.1 m. If the spring constant is 100 N/m, what is the force required to compress the spring?
(a) 10 N (b) 20 N
(c) 50 N (d) 100 N

Answer: A) According to Hook8e's Law, F = kx, where F is the force applied to the spring, k is the spring constant, and x is the displacement of the spring. Rearranging this equation to solve for F, we get F = kx = 100 N/m x 0.1 m = 10 N.

Question 9: Which scientist first formulated Hooke's Law?
(a) Robert Boyle (b) Isaac Newton
(c) Robert Hooke (d) Galileo Galilei
✓ Correct: c) Hooke's Law is named after the English physicist Robert Hooke, who first formulated it in the 17th century.

Question 10: Which type of materials is Hooke's Law applicable to?
(a) elastic materials (b) plastic materials
(c) brittle materials (d) ductile materials
✓ Correct: a) Hooke's Law is applicable to elastic materials, which are those materials that can return to their original shape and size after being deformed under a certain amount of stress.