Question

A truck tows a jeep of mass 1200 kg at a constant speed of 10 ms^-1 on a level road. The tension in the coupling is 1000 N. If they ascend an inclined plane of 1 in 6 with same velocity, the tension in coupling is

• A. 2000 N
• B. 2960N
• C. 1680N
• D. 1000N

Answer 1

Answer: (B)

2960N

Answer 2

On ascending the plane, component of weight of tractor along the inclined plane will add to the given tension when the tractor and truck were moving on a level road

i.e., new tension

T' = T + mg sin θ

= 1000 + 1200 × 9.8 × $\frac { 1 } { 6 }$

= 100 + 1960 = 2960 N