If F = 40 N and M = 1.5 kg, what is the tension in the string connecting M and 2M? Assume that all surfaces are frictionless.

a.
13 N
b.
23 N
c.
36 N
d.
15 N
e.
28 N
Question 2A 70-kg stunt artist rides in a rocket sled which slides along a flat inclined surface. At an instant when the sled's acceleration has a horizontal component of 6.0 m/s
2 and a downward component of 2.8 m/s
2, what is the magnitude of the force on the rider by the sled?
a.
0.83 kN
b.
0.98 kN
c.
0.65 kN
d.
0.68 kN
e.
0.72 kN