What is the magnitude of the net force on the block at the moment it is released
A block with mass m = 5 kg is attached to two springs with spring constants kleft = 30 N/m and kright = 55 N/m. The block is pulled a distance x = 0.22 m to the left of its equilibrium position and released from rest. 1)What is the magnitude of the net force on the block (the moment it is released)=18.7. When the frictionless system shown above is accelerated by an applied force of magnitude F, the tension in the string between the blocks is: A) F B) 2 F C) 23 F D) 12 F E) 13 F Applying Newton’s second law in the absence of friction, F = (3 kg)a. Therefore, a = F/3. ••55 Two blocks are in contact on a frictionless table. A horizontal force is applied to the larger block, as shown in Fig. 5-50. (a) If m 1 = 2.3 kg, m 2 = 1.2 kg, and F = 3.2 N, find the mag nitude of the force between the two blocks. Calculate the magnitude of the acceleration of the crate if (a) its mass is 310 kg and (b) its weight is 310 N. Answer: (a) 0.74 m/s 2; (b) 7.3 m/s 2 78 In Fig. 5-64, a force of magnitude 12 N is applied to a FedEx box of mass m 2 = 1.0 kg. The force is directed up a plane tilted by θ = 37°. When the frictionless system shown above is accelerated by an applied force of magnitude F, the tension in the string between the blocks is: A) F B) 2 F C) 23 F D) 12 F E) 13 F Applying Newton’s second law in the absence of friction, F = (3 kg)a. A block with mass m = 5 kg is attached to two springs with spring constants kleft = 30 N/m and kright = 55 N/m. lowest point will not exceed 7 g? (b) What force is applied on an 80 kg pilot by the plane seat at the lowest point of the pull-out? 86. A horizontal force is applied to a 2.0 kg block, moving on a level table. A force that is one-quarter the force of gravity on the block is required to move it at a constant velocity. 5-64, a force of magnitude 12 N is applied to a FedEx box of mass m 2 = 1.0 kg. The force is directed up a plane tilted by θ = 37°. The box is connected by a cord to a UPS box of mass m 1 = 3.0 kg on the floor. A 2.0-kg object is pushed along a horizontal surface a distance s = 4.0 m by a force F = 30 N to the right and down at an angle of 37 0 to the horizontal. The coefficient of friction between the object and the surface is 0.50. An object of mass m = 2.0 kg is released from rest at the top of a frictionless incline of height 3 m and length 5 m. Taking g = 10 m/s 2, use energy considerations to find the velocity of the object at the bottom of the incline.