Answer:
okay
Explanation:
(wish i could help but im just answering for points)
Answer: 3.92 N.
Explanation:
Your box weighs 400g, or 0.4kg. In order to lift it, you need to overcome the force of gravity. F = ma, and acceleration due to gravity is -9.8 m/s^2. So gravity acts on the box with a force of 0.4 kg * -9.8 m/s^2 = -3.92 N. A force of +3.92 N is required to overcome this.
Answer:
Explanation:
Momentum conservation

Kinetic energy conservation

Solve the system
Answer:
I believe its A: Sports biomechanics.