Calculate the linear momentum for each of the following cases.

Question

(a) A proton with mass 1.67 ✕ 10^-27 kg moving with a velocity of 4.29 ✕ 10⁶ m/s straight up.

(b) A 10.0 g bullet moving with a velocity of 305 m/s to the right

(c) A 69 kg sprinter running with a velocity of 5.2 m/s southwest.

(d) Earth (m = 5.98 ✕ 10²⁴ kg) moving in its orbit with a velocity equal to 2.98 ✕ 10⁴ m/s forward.

Answer 1

Momentum is a vector and has the equation p=mv. That means it has a magnitude (a number) and a direction. These questions ask you to multiply the numbers and state the direction. Momentum does not have special units.

(a) (1.67 ✕ 10^-27 kg) ✕ (4.29 ✕ 10⁶ m/s) = 7.16 ✕ 10^-21 kg m/s up

(b) .. I'll leave the rest for you.