A solid disk is rolling without slipping along a horizontal surface with a speed of 4.50 m/s when it starts up a ramp that makes an angle of 25.0 with the horizontal. What is the speed of the disk after it has rolled 3.00 m up the ramp?
A) 4.01 m/s
B) 1.92 m/s
C) 2.06 m/s
D) 6.79 m/s
E) 8.02 m/s
Question 2
A truck is towing a car whose mass is one quarter that of the truck. The force exerted by the truck on the car is 6000 N. The force exerted by the car on the truck is
A) 1500 N.
B) 24000 N.
C) 3000 N.
D) 6000 N.
E) 12000 N.
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