Question

7. In a class test containing 10 questions, 5 marks are awarded for every correct answer
and (-2) marks are awarded for every incorrect answer and 0 for questions not
attempted.
(1) Mohan gets four correct and six incorrect answers. What is his score?
(ii) Reshma gets five correct answers and five incorrect answers, what is her score?
(ii) Heena gets two correct and five incorrect answers out of seven questions she
attempts. What is her score?​

Answer 1

Answer:

Answer:

Given

List the required material to perform an activity to demonstrate the force of friction and write the procedure....

Answer

➡Friction can slow things down and stop stationary things from moving. In a frictionless world, more objects would be sliding about, clothes and shoes would be difficult to keep on and it would be very difficult for people or cars to get moving or change direction.....

➡From our experiments, we have concluded that the rougher surfaces have a higher coefficient of friction. The highest was sandpaper which had a average coefficient of friction of 1.666. Next was foil, with an average coefficient of friction 1.665......

Hope it will helps you......