John was pulled by a ski boat that weighs 600kg. John’s friend Chris wants to know how much force will need to be exerted for John to travel 20m/s. What force does the boat need to exert?
What Law of motion is demonstrated?

f=ma newton's second law 7x8=56n

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2