Question

A 20 kg child runs at 4 m/s. What is his momentum?

a. 80.N × m
c. 80. kg × m/s
b. 80 N
d. 80. kg × m/s2

Answer 1

as I know the SI unit of momentum is = kg×m /s so momentum. P=MV where M is mass & V is velocity so momentum is mass × velocity the answer will be 80 kg×m/s

Answer 2

GiveN:-

• Mass of Child = 20 kg
• Velocity of the child = 4 m/s

To FinD:-

• Momentum = ??

SolutioN:-

Using Momentum formula:-

`\large \hookrightarrow \: { \underline{ \overline{ \boxed{ \sf{ \: p = \: mv \: }}}}} \\`

where,

• » p denotes momentum.
• » m denotes mass of the object.
• » v denotes velocity of the object.

`\large \sf\longrightarrow \: \: p = \: mv \: \\`

`\large \sf\longrightarrow \: \: p = \: 20 * 4\: \\`

`\large\sf\longrightarrow \: \: p = \: 80 \: \: \\`

`\large \sf\longrightarrow \: \: p = \: 80 \: \: kg. m/s \\`

_____________________________