Question

section b: multiple choice questions

1. which of the following is a non - contact force?

a. friction
b. tension
c. gravity
d. applied force

1. what is the acceleration due to gravity on earth?

a. 8.9 m/s²
b. 9.8 m/s²
c. 10.8 m/s²
d. 11.8 m/s²

1. what is the acceleration due to gravity on earth?

a. 49 n
b. 5 n
c. 50 n
d. 55 n

Explanation:

1. Non - contact forces act at a distance. Gravity acts without physical contact. Friction, tension, and applied force require contact.
2. The standard value of acceleration due to gravity on Earth is \(9.8\ m/s^{2}\).
3. Since question 3 seems to be a misprint (units are in Newtons instead of \(m/s^{2}\)), but assuming it's a force - related question (maybe weight of a \(5\ kg\) object \(F = mg\), \(m = 5\ kg\), \(g=9.8\ m/s^{2}\approx10\ m/s^{2}\), \(F = 5\times10=50\ N\)).

Answer:

1. C. Gravity
2. B. \(9.8\ m/s^{2}\)
3. C. \(50\ N\)