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شوفوها معاااي:


6. A block is pushed up a frictionless 30° incline by an applied force as shown. If F = 25 N
and M = 3.0 kg, what is the magnitude of the resulting acceleration of the block?

الخيارات :

a. 2.3 m/s2 b. 4.6 m/s2 c. 3.5 m/s2 d. 2.9 m/s2 e. 5.1 m/s2
2
.

الحل:

F= ma

25cos * 30 - 3 * 9.8 * cos 60 =


3a=


a= 2.3 m/sec^2