Question 6 of 26 John coasts on his skateboard at a speed of 2 m/s. He uses his foot to increase his speed to 5 m/s. If he has a mass of 80 kg, what impulse did he apply? A. 160 kg. m/s B. 400 kg•m/s C. 320 kg-m/s D. 240 kg•m/s SUBMIT​

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

What is the coefficient of kinetic friction μk between the block and the tabletop?