Give reasons : (for the following questions)
Please do not skip any questions if anyone give all answers correctly without skipping i will be marking him/her as brainliest . The question are below :
(1) Winding roads are made on hills.
(2)A third class lever cannot magnify force
(3) Tin shears have longer handles than the scissors used to cut cloth.
(4) It is easier to lift the load as the load is pushed towards the wheel in a wheelbarrow .
And yes please do not copy the answers from any website or google
please give the answer fast it is urgent whoever will give the answer of this question correctly and sweetly i will mark him/her s the brainliest............
fast please
Answers
Explanation:
(1) Mountainous roads are winding and gently sloping in order to reduce the effect of steepness which causes more downward gravitational pull to the vehicles on it. A steeper sloped road would slow the car down to a greater extent that an gently sloping one. So, we have in effect reduced the undesirable effect of gravity by doing so.
(2) The third class lever cannot magnify our force because in third class lever the effort it between the load and the fulcrum. Also, in this type of lever no matter where the force is applied, it is always greater than the force of load. Hence, That type of lever cannot magnify our force.
(3) A pair of scissors used to cut a peice of cloth has blades longer than the handles so that the blades move longer on the cloth than the movement at the handles. While shears used for cutting metals have short blades and long handles because it enables us to overcome large resistive force by a small effort.
(4) The wheelbarrow's wheel and axle help the wheelbarrow to move without friction thus making it easier to push or pull. That's why it will be easier to lift a load in wheel barrow of the load is transferred towards the wheel.
Answer:
(1)Mountainous roads are winding and gently sloping in order to reduce the effect of steepness which causes more downward gravitational pull to the vehicles on it.
(2) The third class lever cannot magnify our force because in third class lever the effort it between the load and the fulcrum.
(3)A pair of scissors used to cut a piece of cloth has blades longer than the handles so that the blades move longer on the cloth than the movement at the handles.
(4) The wheelbarrow's wheel and axle help the wheelbarrow to move without friction thus making it easier to push or pull.
pls mark as brainlist
hope this will help you .....