Question

A roller coaster car moving at a velocity of 30 meters/second has a momentum of 2.5 × 104 kilogram meters/second. What is its mass? whats the answer for this question

Answer 1

Answer:

830 kg

Explanation:

Momentum = mass × velocity

2.5×10⁴ kg m/s = m (30 m/s)

m = 833.3 kg

Rounded to two significant figures, the mass is 830 kg.

Answer 2

The mass of roller coaster car is$8.3\times10^2 kilograms.$

Explanation:

We know momentum of any body is product of its mass and its velocity.

Using the above relation we can form an equation,

P=mv

where

P =momentum

m=mass

v=velocity

Re arranging the equation, we have

m = P / v

Now substituting the values,

$m = \frac{2.5 \times10^4}{30}$

$m = 8.3\times10^2 kilograms.$