A stationary 8.60 kg wood crate is pushed with an 46.5 N horizontal force that is parallel to a level concrete surface (µS = 0.61, µK = 0.52). A. Will the box move?  Justify your answer.  B. What is the necessary applied force to accelerate the box at 1.90 m/s2 [forward]?

A block of mass M is suspended at rest by two strings attached to walls, as shown in the figure. T1 is measured to be 120 N and 0 = 40°. Match the answers with questions. (Hint: Draw a proper free-body diagram.) T1 T? M v What is the magnitude of T2? A. 120 N v What is the mass of the block? В. 92 N v What is the net force on the block? С. 7.7 N D. 77 N Е. 101 N F. 7.7 kg G. 143 N Н.О

24. A pickup truck with mass 980 kg is initially at rest. The truck accelerates to a speed of 95 km/hr within a distance of 60 meters. What the direction and size of the force that acts on the truck? a. b. If the truck were carrying a load of 200 kg, what new force would be required to achieve the same acceleration?

2. A 3.00 kg block is placed at the top of a 21.0° rough inclined plane with us = 0.325 and Hk =0 .215 %3D and a length of 1.78 m. a) Draw a free-body diagram of the block. b) Prove that, if released from rest, the block will immediately start sliding. c) Find the magnitude of the block's acceleration. d) Calculate the time the block takes to reach the end of the incline.

You are in charge of a cannon that exerts a force 17100 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.37 m and the cannon is aimed at a 36.7 ◦ angle from the ground. The acceleration of gravity is 9.8 m/s 2 . If you want the ball to leave the cannon with speed v0 = 89 m/s, what mass cannon ball must you use? Answer in units of kg. Answer in units of kg.

A crate is moving as shown is slowed down by a pushing force P. The force P has a horizontal component of 200 newtons to the left and a vertical component 300 newtons down. The mass of the crate is 90 kgs and the coefficient of kinetic friction is 0.2 and static friction is 0.4. V P What is the magnitude of the acceleration of the crate? Answer in m/s². Use g = 10 m/s². Don't guess! Use the free body diagram method.

Two objects, A and B, are placed on an inclined plane that can be rotated to different angles of elevation. A starts and u R. Choose the last answer that is correct. HA to slide at twice the angle of elevation that B starts sliding. The respective coefficients for static friction for A and B are Select one: a. HB > HA b. HA = 2µB c. HA > HB 2H A d. в

4. a. There is a forward force of 4962.5 N on the front train car from the engine. There is no friction. What is the acceleration of the train? m₁ = 1070 kg, m₂ = 450 kg, and m3 = 1356.25 kg. m3 Previous submissions: b. What is T₁? Previous submissions: c. What is T2? Previous submissions: m2 m₁