42. A car of mass 1000kg travelling along a straight path accelerates uniformly from 15m/s to 25m/s in a distance of 320m. the resistance to the motion of the car is 145N. the driving force of the engine of the car is A. 480 B. 207.5 C. 770 D. 760

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Chapter1: Units, Trigonometry. And Vectors
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42. A car of mass 1000kg travelling along a straight path accelerates uniformly
from 15m/s to 25m/s in a distance of 320m. the resistance to the motion of
the car is 145N. the driving force of the engine of the car is
A. 480
B. 207.5
C. 770
D. 760
43. A particle of mass 15kg rest on a smooth horizontal table. It is connected by
a light flexible string passing over a smooth pulley fixed at the edge of the
table to another particle of mass 10kg which hangs freely. Taking g as 10ms-2
and given that the acceleration of the system is 4ms2 when the system is
released from rest. The force exerted by the string on the pulley is
A. 60 2N
B. 120-/2 N
C. 60N
D. 120N
Transcribed Image Text:42. A car of mass 1000kg travelling along a straight path accelerates uniformly from 15m/s to 25m/s in a distance of 320m. the resistance to the motion of the car is 145N. the driving force of the engine of the car is A. 480 B. 207.5 C. 770 D. 760 43. A particle of mass 15kg rest on a smooth horizontal table. It is connected by a light flexible string passing over a smooth pulley fixed at the edge of the table to another particle of mass 10kg which hangs freely. Taking g as 10ms-2 and given that the acceleration of the system is 4ms2 when the system is released from rest. The force exerted by the string on the pulley is A. 60 2N B. 120-/2 N C. 60N D. 120N
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