Friction Test

Result

Friction Test - 1

Score
-
out of -
Rank
-
out of -

TIME Taken - -

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Question 1
1 / -0

A box was pushed equal distance on four different surfaces. The force needed for each surface was recorded in the given table.

Surface M N O P

Force Needed (N) 670 570 320 500

On which surface was the friction least?

A
M

B
N

C
O

D
P

Solution

Friction opposes the motion of an object. For surface O, force needed to push the box is least i.e., 320 N, so it has least friction.
Question 2
1 / -0

Read the given statements and select the correct option.

Statement 1: It takes a much longer time and covers more distance to stop a moving ship in water than a moving car with same speed on the road.
Statement 2: The friction on water surface is much less than the solid surface.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

B
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true but statement 2 is false.

D
Statement 1 is false but statement 2 is true.

Solution

Water surface offers less resistance to the ship than the road to the car. Hence, a ship covers a longer distance and takes longer time before stop.