Alex is asked to move two boxes of books in contact with each other and resting on a frictionless floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force 9.3 N. Here box A has a mass m 12.1 kg and box has a mass m - 7.0 kg. The contact force between the two boxes is F and N denotes the normal force. m m₂ (a) What is the acceleration (in m/s2) of the two boxes? m/s2 (b) What is the force (in N) exerted on ma by m? N (c) If Alex were to push from the other side on the 7.0 kg box, how would your answer to part (b) change? N p

An object has a velocity (4.69 m/s)i + (-4.4 m/s)j + (4.73 m/s)k. In a time of 5.5 s its velocity becomes (-2.22 m/s)i + (0.00 m/s)j + (4.73 m/s)k. 1) If the mass of the object is 3.31 kg, what is the magnitude of the net force on the object, in N, during the 5.5 s? Assume the acceleration is constant.

A flea jumps by exerting a force of 1.28 × 10-5 N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 0.660 x 10-6 N on the flea. Find the direction and magnitude of the acceleration of the flea if its mass is 6.50 x 10-7 kg. Do not neglect the gravitational force. (Assume that the breeze blows in the +x-direction and that the +y-direction is up.) magnitude m/s2 direction o counterclockwise from the +x-axis Additional Materials

The launch thrust of the Space Shuttle’s rocket engines is approximately 3.47×107 N. If the Shuttle’s launch mass is about 2.00×106 kg, what is the acceleration at liftoff? I know that F net =F thrust, so the opposing but equal force is - mg F net = F thrust - mg m = 2.00 x 10^6 kg F net = N = 2.00 x 10^6 (9.8) =mg, expressed as N is 1.96x107 N =  3.47×107 N (up) - 1.96x107 N (down) then...

A truck collides with a car, and during the collision, the net force on each vehicle is essentially the force exerted by the other. Suppose the mass of the car is 850 kg, the mass of the truck is 2,750 kg, and the magnitude of the truck's acceleration is 14 m/s2. Find the magnitude of the car's acceleration (in m/s2).

The following figure shows the acceleration of objects of different mass that experience the same force. Suppose a0 = 6.0m/s^2. What is the magnitude of the force? Express the answer in two significant figures.