Imagine that a 1200 kg vehicle speeds up from rest to 20.0 m/s in 80 m. How much work was done on the car? (Answer in 3 sig figs)

answer; i believe that the correct answer is (d) a very small amount of mass

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

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft

b

explanation: