The energy used in rolling the fuel tank on the coal tar is much less because in pulling the fuel tank via an inclined plane the frictional force to be overcome will be greater than rolling it down the plane.
85) It is easier to roll a barrel full of coal tar than to pull it because
Answer is:
the rolling friction is much less than the sliding friction
Explanation:
Related General Physics MCQ with Answers
Answer is:
3
Explanation:
One is obviously out. Two is out because if two unequal forces n and p act on an object the resultant with the minimum force in magnitude is |n - p|, which will never be 0 if n =/= p. Three can be easily resolved with a quick example. Imagine an object with three concurrent forces acting on it. Two forces, n = 3 N and p = 4 N, create an angle with eachother such that the resultant is 5 N. 180 degrees from the resultant, a force, r = 5 N, is acting on the object. Thus three unequal vectors on an object can result in 0.
Answer is:
an object existence
Explanation:
Suppose many people are there in a room, then Sound intensity will be low but in case of vacant room or very few people inside the room, the Sound has more intensity. That mean it depends on the object. So, it is an object existence.
Answer is:
east
Explanation:
With vertical, the rel-velocity will be inclined and appear to be coming from east. So the right answer is east.
Answer is:
3.33 km
Explanation:
Velocity= 600Km/hr = 600x1000/3600 m/s=166.66m/s Ht=1960m. To Find: The range of the projectile (R). Its actually a Projetile motion . For a projectile Ht=1/2*g*t*t.There fore we get t= 20s. R=V*t=166.66*20=3333.33m/s=3.333Km/hr.