Question

1. a book resting on a table remains at rest because:

a. no forces act on it
b. forces are balanced
c. only gravity acts
d. only normal force acts

1. newtons second law states that acceleration is:

a. independent of force
b. caused by balanced forces
c. directly proportional to net force

Explanation:

For question 2:

• A book on a table has two forces acting on it: gravity (pulling down) and the normal force (pushing up).
• Since the book is at rest, these forces are balanced (\(F_{net}=0\)).
• Option A is wrong because there are forces (gravity and normal). Option C and D are wrong as both forces act.

For question 3:

• Newton's second law is \(F = ma\) (where \(F\) is net force, \(m\) is mass, \(a\) is acceleration).
• Rearranged as \(a=\frac{F}{m}\), so acceleration is directly proportional to net force (\(a\propto F\) when \(m\) is constant).
• Option A is wrong as \(a\) depends on \(F\). Option B is wrong as balanced forces (\(F = 0\)) give \(a = 0\).

Answer:

1. B. Forces are balanced
2. C. Directly proportional to net force