Please help me answer the following exercises.

A 7.7 kg object experiences an acceleration of 4.1 m/s2. (a) What is the magnitude of the resultant force acting on it (in N)? N (b) If this same force is applied to a 4.6 kg object, what is the magnitude of the acceleration (in m/s2)? m/s2 Need Help? Read It 2. [-/2 Points] DETAILS SERCP11 4.2.P.003. A 8.1 kg object undergoes an acceleration of 1.1 m/s2. (a) What is the magnitude of the resultant force acting on it? N (b) If this same force is applied to a 4.9 kg object, what acceleration is produced? m/s2A train locomotive pulls a train with a mass of 1.00 x 107 kg on level rails. The locomotive exerts a constant force of 7.60 x 105 N on the train. How much time does it take to increase the speed of the train from rest to 60.0 km/h? (Ignore any resistance force from the rails on the wheels of the train. Enter your answer in minutes.) 7' min Need Help7 4. [-/2 Points] Four forces act on an object, given by E = 40.3 N east, 5 = 38.3 N north, 8 = 92.7 N west, and 6 = 70.7 N south. (Assume east and north are directed along the +x-axis and +y-axis, respectively.) (a) What is the magnitude of the net force (in N) on the object? (b) What is the direction of the force? (Enter your answer in degrees counterclockwise from the +x-axis.) SERCP11 4.2.P.007. l N i counterclockwise from the +X-axis MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A 4.0-g bullet leaves the muzzle of a rifle with a speed of 340 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.85-m-long barrel of the rifle? IN Need Help? Read It Watch It 6. [-/2 Points] DETAILS SERCP11 4.3.OP.024. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The figure below shows a block with mass m = 5.3 kg pulled up a ramp inclined at an angle of 0 = 260 with a force of magnitude F = 40 N parallel to the ramp. Se (a) If there is no friction between the block and the ramp, what is the magnitude of the block's acceleration (in m/s2)? m/ s 2 (b) If instead the coefficient of kinetic friction between the block and the ramp is 0.12, what is the magnitude of the block's acceleration (in m/s2)? m/s2