A box has a mass of 2.50 kg is at rest on a horizontal frictionless surface. Four forces act on the box. The four forces are: F₁ = 20.0 N (North), F₂ = 30.0 N (East), F3 = 15.0 N (South), and F4 = 40.0 N (West). What is the resulting acceleration of the box? Select one: Oa. O b. C. d. 4.47 m/2 @ 26.6° (North of West) 31.3 m/s2 @ 26.6° (West of North) m/s2 @26.6° (North of West) 31.3 m 4.47 m/s2 @ 26.6° (West of North)

Suppose you pull a suitcase with a strap that makes a 60° angle with the horizontal. The magnitude of the force you exert on the suitcase is 40 Ib. a. Find the horizontal and vertical components of the force. b. Is the horizontal component of the force greater if the angle of the strap is 30° instead of 60°? c. Is the vertical component of the force greater if the angle of the strap is 30° instead of 60°? a. Consider the figure (not to scale) to the right. It shows the force vector F along with its horizontal and vertical components, F, and Fy, respectively. Which of the following formulas will correctly evaluate F Fx and Fy? TO O A. F, = F| sin 0 and F, = F| cos 0 O B. F = |F| tan 0 and F, = |F| cot0 O C. F=|F| cos 0 and F, = |F| sin 0 O D. Fy = |F| cot 0 and F, = |F| tan 0

4. Block A in the figure has a mass of 4.00 kg and block C has a mass of 13.9 kg. The coefficient of kinetic friction between block B and the horizontal surface is 0.287. a. What is the mass of block B if block B is moving to the right and speeding up at a rate of 1.45 m/s²? b. What is the tension in each cord when block B has this acceleration? A B

Calculate the magnitude of a normal force on a 22.7 kg block in the following circumstances. a. the block is resting on a level surface. b. the block is resting on a surface tilted up at 40.8 degrees with respect to the horizontal. c. the block is resting on the floor of an elevator that is accelerating upward at 2.53 m.s^2 d. the block is on the level surface and a force of 115 N is exerted on it at an angle of 40.8 degrees below the horizontal.