John carried out an experiment to find out how different surfaces P- Q- R and S affect the distance a car travelling at 50 km - h needed to stop once the brakes are applied- The results are shown below- begin array c c c c c Type of road surfaces-P-Q-R-SStopping distance -18-15-19-27 lend array Which type of road will provide the most friction for the car to stop-A- PB- QC- RD- S

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Standard VIII

Physics

Effect of Nature of Surface on Friction

John carried ...

Question

John carried out an experiment to find out how different surfaces (P, Q, R and S) affect the distance a car travelling at 50 km/h needed to stop once the brakes are applied. The results are shown below.
$\begin{matrix} T y p e o f r o a d s u r f a c e s & P & Q & R & S S t o p p i n g d i s t a n c e & 18 & 15 & 19 & 27 \end{matrix}$
Which type of road will provide the most friction for the car to stop ?

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Solution

The correct option is B
Q

Q provides the most friction for the car to stop as it has the least stopping distance which implies that this surface provides more grip on the wheels of the car.

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Similar questions

John carried out an experiment to find out how different surfaces (P, Q, R and S) affect the braking efficiency of a car traveling at $50 k m / h$ . The results are shown below.
$\begin{matrix} Type of road surfaces & P & Q & R & S Stopping distance & 18 m & 15 m & 19 m & 27 m \end{matrix}$
Which type of road will provide the greatest frictional force for the car to stop?

Q. John carried out an experiment to find out how different road surfaces (P, Q, R and S) affect the stopping distance of a car travelling at 50 km/h. The result is tabulated below.

\begin{matrix} Type of road surface & P & Q & R & S Stopping distance (m) & 18 & 15 & 19 & 27 \end{matrix}

Which surface provides maximum frictional force?

Q. John carried out an experiment to find out how different road surfaces (P, Q, R and S) affect the stopping distance of a car travelling at 50 km/h. The result is tabulated below.

\begin{matrix} Type of road surface & P & Q & R & S Stopping distance (m) & 18 & 15 & 19 & 27 \end{matrix}

Which surface provides maximum frictional force?

Q. Harry carried out an experiment to find out how different surfaces (A, B, C and D) affect the distance of a car travelling at 50 km/h needed to stop once the brakes applied. The results are shown below in given table. Which type of road will provide the most friction for the car to stop?

हैरी यह ज्ञात करने के लिए एक प्रयोग करता है, कि भिन्न-भिन्न पृष्ठ (A, B, C तथा D) 50 km/h से गतिशील एक कार को ब्रेक लगाकर रोकने के लिए आवश्यक दूरी को किस प्रकार प्रभावित करते हैं। परिणाम नीचे दी गई सारणी में दर्शाए गए हैं तथा किस प्रकार की सड़क कार के रूकने के लिए सर्वाधिक घर्षण प्रदान करेगी?

Types of road surface (सड़क के पृष्ठ के प्रकार)	Stopping distance (m) (रूकने की दूरी (m))
A	18
B	25
C	19
D	17

Q. Match the following animals with the mode of digestion that they carry out.

\begin{matrix} Animal & Mode of Digestion a. House fly & p. Dead Meat b. Dogs & q. Eat their own excreta c. Chicken & r. Swallow small stones for grinding food d. Rabbits & s. Puke digestive juices on food \end{matrix}

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The correct option is B Q Q provides the most friction for the car to stop as it has the least stopping distance which implies that this surface provides more grip on the wheels of the car.

The correct option is B
Q

Q provides the most friction for the car to stop as it has the least stopping distance which implies that this surface provides more grip on the wheels of the car.