(E)
Questions 2 and 3 refer to the following information: A student pulls a 20 kg dolly to the right at a
constant rate of 1 m/s with an 80 kg force angled 60° above the horizontal ground as shown in the
figure. The coefficient of friction between the dolly and the ground is 0.1.2 . The normal force from the ground on the dolly is closest to
(A) 100 N
(B) 130 N
(C) 160 N
(D) 170 N
(E) 200 N3 . Which of the following equations correctly models the relationship between the forces in the
horizontal direction?
(A)