If the speedometer of a car indicates a constant reading, then the car is in
A) uniform motion
B) non – uniform motion
C) circular motion
D) no motion
1 Answers
A racing car completes 5 rounds of a circular track in 2 minutes. Find the radius of the track if the car has uniform centripetal
Given: 5 rounds = 2πr(5), t = 2minutes = 120s To find: Radius (r) Formula: acp = ω2r Calculation: From formula, acp = ω2r ∴ π2 = \(\frac{V^2}{r}\) But v = \(\frac{2\pi r(5)}{t}=\frac{10\pi r}{t}\) ∴ π2 = \(\frac{100 \pi^2 r^2}{rt^2}\) ∴ r = \(\frac{120\times120}{100}\) =144m The radius of...
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The pressure reading in a thermometer at steam point is 1.367 × 10^3 Pa. What is pressure reading at triple point knowing the linear relationship
Given: P = 1.367 × 103 Pa at steam point (T) i.e., at 273.15 + 100 = 373.15 K. Linear relationship between temperature and pressure means that. P ∝ T ⇒ P1T1 = P2T2 To find:...
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A vector can be represented as a directed line segment in which length indicates ……………….. and arrow indicates ……………..
A) magnitude, direction
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Sridevi uses a scooter to go her office. The initial and final readings of speedometer are 4849 and 5549 respectively.
Correct option is B) 28 km/hr
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Assertion (A) : Speedometer of a vehicle reads instantaneous velocity
A) Both A and R are correct, R is correct explanation of A
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We can push a bicycle easily, then a car because, A) mass of the bicycle > mass of the car
B) mass of the car > mass of the bicycle
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Pull one brick with a spring balance (Reading – 1) Pull two bricks with a spring balance (Reading – 2)
Correct option is B) 2 > 1
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If a car travels 60 kmph then it reaches the destination in 4 hours. If the car travels at 80 kmph then the time taken by car is ………………. hrs
Correct option is (D) 3 Distance covered by car by travelling 60 kmph in 4 hours = speed \(\times\) time \(=60\times4\) = 240 km When car travels at 80 kmph then time by the car \(=\frac{Distance}{Speed}\) \(=\frac{240}{80}\) =...
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A car reaches 300 km in 6 hours then how much distance is travelled by the car in 8 hours ?
Correct option is (D) 400 km Speed of the car \(=\frac{Speed}{Time}\) \(=\frac{300\,km}{6\,hours}\) = 50 km/h Distance travelled by the car in 8 hours = speed \(\times\) time = 50 km/h \(\times\) 8 hours = (50 \(\times\) 8) km = 400 km
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