Two identical blocks, A and B, of mass M, are stacked in an elevator as shown to the right. The elevator accelerates upwards with acceleration a . What is the magnitude of the force that block A exerts on block B?
M (g+a)
M (g-a)
2 M (g+a)
https://online-s.physics.uiuc.edu/cg...s/9/fig23a.gif
2. Three boxes are arranged as shown. The middle box has a mass of 2 kg and accelerates to the right at 5 m/s2 on a horizontal frictionless table. The boxes to the left and right hang freely, suspended by strings over massless, frictionless pulleys. The tension in the left string is T1 = 10 N.
What is the mass of the box, M1, on the left?
M1 = 0.675 kg
M1 = 1.91 kg
M1 = 2.13 kg
M1 = 3.75 kg
M1 = 4.16 kg
https://online-s.physics.uiuc.edu/cg...ts/9/fig10.gif