1) An object starts from rest with an acceleration of 2.0 m/s 2 for 3.0 seconds.
ID: 2114815 • Letter: 1
Question
1) An object starts from rest with an acceleration of 2.0 m/s2 for 3.0 seconds. It then reduces its acceleration to 1.0 m/s2 for 5.0 additional seconds. The total distance covered is
7.6 m
52 m
C) 9.7 m
d)11 m
2) A 4.0 kg mass has a velocity of 12 m/s to the WEST. The 4.0 kg mass undergoes an acceleration of 2.0 m/s2 to the WEST for 3.0 sec. What is the velocity of the 4.0 kg mass at the end of the 3.0 sec interval?
0.00 m/s
18 m/s to the WEST
6.0 m/s to the WEST
6.0 m/s to the EAST
3) Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m1, has a mass of 7.0 kg and the other mass, m2, has a mass of 3.0 kg. The pulley turns on a shaft through the center of the pulley and supports the pulley and all the masses. The vertical force of the shaft on the pulley that supports the whole system is
82 N upward.
49 N downward
82 N downward.
98 N upward.
A)7.6 m
B)52 m
C) 9.7 m
d)11 m
Explanation / Answer
1.s=51.5 m
=(B) 52m
18 m/s to the WEST
98 N upward.
2 (B)18 m/s to the WEST
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