Question

1. A 12 kg dog is running 5 m/s. How much kinetic energy does the dog have?

2. Another dog is also running at 5 m/s, but this one has 100 Joules of kinetic energy. What is this dog's mass?

Answer 1

1. 150j

2. 8kg

Step-by-step explanation:

1, KE = 1/2mv^2

= 1/2(12)×(5)^2

= 6 × 25

KE = 150j

2, KE= 1/2mv^2

100j = 1/2m× (5m/s)^2

2(100j) = m × 25

m = 200/25

m = 8kg

i hope it helps