2. The acceleration of the cart shown below is represented in the given graph. If a second block is added to the cart, what might be the resulting acceleration? 124 (mis
B В
OS
M M M
0.4
(6)
0
-04
-0.8
-12
O A 0 m/s/s
O B.0.27 m/s/S
OC 0.4 m/s/s
OD 0.53 m/s/s

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

How can you increase the strength of an electromagnet?

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm