Question

select all that apply. if a car has a mass of 1500 kg and a velocity of 75 km/h west, to calculate the cars momentum in units of kg·m/s, you would need to convert km/h to m/s. convert the mass to grams. replace velocity with speed. multiply mass by velocity.

Explanation:

Step1: Check unit - conversion requirement

The desired unit of momentum has velocity in m/s. Given velocity is in km/h, so we need to convert km/h to m/s.

Step2: Analyze mass - unit requirement

The mass is already in kg which is the correct unit for the given momentum unit, so no need to convert it to grams.

Step3: Understand velocity - speed difference

Momentum is mass times velocity (a vector quantity), not speed (a scalar quantity), so we don't replace velocity with speed.

Step4: Recall momentum formula

The formula for momentum \(p = m\times v\), so we need to multiply mass by velocity.

Answer:

• Convert km/h to m/s.
• Multiply mass by velocity.