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Problems With Physics? Trivia Quiz

Calculations are needed here. Related formulae are given. Take g=10 m/s/s. SI units are used. Answer in numerals. All the best!

A multiple-choice quiz by namastheg. Estimated time: 5 mins.

Author
namastheg

Time
5 mins

Type
Multiple Choice

Quiz #
78,010

Updated
Dec 20 23

# Qns
10

Difficulty
Average

Avg Score
6 / 10

Plays
3072

One at a Time - Single Page

Question 1 of 10

1. How much time will an electric engine of 500W take to lift a mass of 50 kg through a distance of 5 metres? (Potential Energy = Mass X g X Height ; Power = Work or Energy / Time)

Answer: (Number of seconds in one word or digit only)

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Question 2 of 10

2. A car speeds up from 54 km/hr to 90 km/hr in 2 sec. Calculate its acceleration. (Acc. = Change in velocity / Time ; Use 1 km/hr = 5/18 m/s)

Answer: (__ m/s/s)

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Question 3 of 10

3. A Force of 100 N produces an acceleration of 2 m/s/s in a body. Calculate its mass. (Newton's Second Law) Hint

50 kg

102 kg

200 kg

10000 kg

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Question 4 of 10

4. What current will pass through a circuit of potential difference 200 V with a resistance of 25 Ohms? (Ohm's Law) Hint

225 A

8 A

5000 A

175 A

5. If 21 kJ of heat energy is supplied to 5 kg of water, what is the increase in the temperature of water? Remember, heat = mass times specific heat X change in temp; the specific heat of water is 4.2 kJ/kg/K.

Answer: (__ Kelvin)

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Question 6 of 10

6. A body of mass 10 kg accelerates from 20 metres per second(m per s) to 30 m per s in just 1 second. What's the magnitude of the force applied? (Acceleration is the rate of change of velocity; Force = Mass X Acc.

Answer: (__ newtons)

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Question 7 of 10

7. A family consumes 14.5 kilograms of LPG in 29 days. Calculate the average energy consumption per day if the calorific value of LPG is 55 kJ per gram. (Calorific Value of as fuel = Energy Released / Mass burnt) Hint

32,500 kJ

25,000 kJ

27,500 kJ

17,500 kJ

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Question 8 of 10

8. One Horsepower equals how many watts, in the imperial measurement system? Hint

746

922

640

256

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Question 9 of 10

9. Another easy one. What will happen to the kinetic energy of the object if its velocity is halved? (KE = 0.5 X Mass X Velocity squared) Hint

It will become one fourth

Remains the same

It will be halved

It will become one eighth

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Question 10 of 10

10. Calculate the current through a circuit, if the voltage across the circuit is 100 V and the resistance is 100 ohms. (Voltage = Current X Resistance) Hint

10000 Amperes

0 Ampere

200 Amperes

1 Ampere

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Quiz Answer Key and Fun Facts

1. How much time will an electric engine of 500W take to lift a mass of 50 kg through a distance of 5 metres? (Potential Energy = Mass X g X Height ; Power = Work or Energy / Time)

Answer: 5

In this case, work done is the potential energy of the object.

2. A car speeds up from 54 km/hr to 90 km/hr in 2 sec. Calculate its acceleration. (Acc. = Change in velocity / Time ; Use 1 km/hr = 5/18 m/s)

Answer: 5

54X5/18 = 15 and 90X5/18 = 25. So Acc = 10/2 = 5 m/s/s

3. A Force of 100 N produces an acceleration of 2 m/s/s in a body. Calculate its mass. (Newton's Second Law)

Answer: 50 kg

Force = Mass X Acc. Newton's famous Second Law of Motion.

4. What current will pass through a circuit of potential difference 200 V with a resistance of 25 Ohms? (Ohm's Law)

Answer: 8 A

Resistance = Voltage/Current, which implies Current = 200/25 = 8 Amperes.

Answer: 1

21 = 5 X 4.2 X T, which implies T=1.

Answer: 100

Acceleration equals 30 m per s minus 20 m per s divided by one second. Therefore acceleration is 10 metres per second square. So force is 10 X 10 equals 100 Newtons.

Answer: 27,500 kJ

LPG consumed in one day equals 14.5 divided by 29 equals 500 g. So energy equals 500 X 55 equals 27500 kJ.

8. One Horsepower equals how many watts, in the imperial measurement system?

Answer: 746

Horsepower is an old term used to compare the power of cars with horses.

9. Another easy one. What will happen to the kinetic energy of the object if its velocity is halved? (KE = 0.5 X Mass X Velocity squared)

Answer: It will become one fourth

Kinetic Energy is half the product of mass and square of velocity, which implies that if velocity becomes half, KE becomes half X half = one fourth.

10. Calculate the current through a circuit, if the voltage across the circuit is 100 V and the resistance is 100 ohms. (Voltage = Current X Resistance)

Answer: 1 Ampere

The formula was deduced by by George Ohm.

Source: Author namastheg

This quiz was reviewed by FunTrivia editor crisw before going online.
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