Question

the table below lists the masses and velocities of several moving things
which of the things listed has a momentum nearest that of a 0.145 kg baseball moving at a velocity of 45 m/s?
dog
truck
steel pellet
toy car

Explanation:

Step1: Calculate baseball's momentum

Momentum formula: $p = m \times v$.
Baseball momentum: $0.145 \times 45 = 6.525$ kg·m/s.

Step2: Calculate Dog's momentum

Dog momentum: $16 \times 0.4 = 6.4$ kg·m/s.

Step3: Calculate Truck's momentum

Truck momentum: $5000 \times 0.5 = 2500$ kg·m/s.

Step4: Calculate Steel Pellet's momentum

Steel Pellet momentum: $0.003 \times 450 = 1.35$ kg·m/s.

Step5: Calculate Toy Car's momentum

Toy Car momentum: $0.51 \times 8.2 = 4.182$ kg·m/s.

Step6: Compare to find nearest

Baseball momentum: 6.525 kg·m/s. Dog's momentum (6.4 kg·m/s) is nearest.

Answer:

Dog