Question

A 900-kg giraffe runs across a field at a rate of 50 km/hr. What is the magnitude of its momentum?

Answer 1

The real answer is 45,000 because i look at this to get the answer and it wasn't on there so i guessed and i got it right.

Answer 2

Answer:

As per the statement:

A 900-kg giraffe runs across a field at a rate of 50 km/hr.

⇒ m = 900 kg and

$v=50 km/hr$

Use conversion:

$1 km/hr = \frac{5}{18} m/s$

$v = 50 \times \frac{5}{18} = \frac{250}{18} m/s$

The magnitude of its momentum is given by:

$p = mv$

where

m is the mass in kg

v is the speed in m/s

Substitute the given value we have;

$p = 900 \times \frac{250}{18} = 50 \times 250 = 12500 kg m/s$

Therefore, the magnitude of its momentum is  12500 kg m/s