Please answer
my quastions

a) 120 N

b) 5 N

c) 0.2 N

d) Mass remains the same, and weight decreases.

Explanation:

Use the formula W = mg, where mass is in kg, and gravitational field strength in N/kg.

a)

W = mg

= 12 × 10

= 120 N

b)

500 g = 0.5 kg

W = mg

= 0.5 × 10

= 5 N

c)

20 g = 0.02 kg

W = mg

= 0.02 × 10

= 0.2 N

d)

Mass remains the same, and weight decreases.

gets less

v=ir = 3x15 =45 v