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Supposed a truck, 10 - m long travels at a speed of 2.5 x 108 m/s relative to two observers, Ana and Marie. Both observers have a can of orange spray paint, which they fire simultaneously when the respective ends of the truck are directly in front of them. When the truck stops, Ana,
Marie and the truck driver look at the orange paint spots. How far apart are these spots? How would the truck driver interpret the same event while in the moving truck?
A 1-kilometer long train is travelling at a speed of 100 mi/hr. How long is the train as observed by a passenger who was left standing on the platform? Is length contraction observed? Explain your answer briefly.
Assuming that you are moving with a constant speed of 0.65c when you passed by a man on
the sidewalk who started looking at his watch. From your observation, it took him 5 seconds to
look at his watch then look up. How much time elapsed in the man’s frame?
A 5-kg box is dropped from a height of 68 m. What is the potential energy of the ball? Assuming that the reference position is the ground.
A gas occupies a volume of 50 mL at a temperature of 0°C and a pressure of 2,000 N / m3. What volume will be occupied by the same amount of gas also at 0°C if the pressure is increased to 10,000 N / m3.
A train is scheduled to travel with a velocity of 72 kmh-1 in a certain limit of its route. Due to renovation the
train had to travel 1km of the above limit with a velocity of 9 kmh-1.If the train travelled 1575m while
reducing velocity from 72 kmh-1to 9 kmh-1 and 3150m while increasing velocity from 9 kmh-1 to 72 km h-1
, how late will the train be?
1. Determine the reading of the voltmeter shown in the figure. Consider the values of the
resistors as: R1 = 5Ω, R2 = 4.4Ω, R3 = 7.7Ω, R4 = 4.5Ω, R5 = 4.8Ω and that the source
provides a voltage V = 8.2V .
2. Let us be two cylindrical conductors connected in parallel, to which a potential
difference of V = 170V is applied. The two conductors are made of the same material,
but the first is 6 times the length of the second, and the radius of the second. The
resistance of the second is R2 = 469Ω. Determine the equivalent resistance.
3. In the circuit shown in the figure, the ideal ammeter measures I = 0.4A in the indicated
sense, and the ideal voltmeter measures a potential drop of V = 8.8V passing from b a a.
Determines the value of the emf ε2
.
Data: R1 = 56.2Ω, R2 = 23.3Ω, R3 = 27.4Ω.
1If a 10 kg object is moving at 5 m/s what force is required to maintain it the force is required to stop it in two seconds
Assuming that the object are on Earth, where acceleration due to gravity is
10N/kg, calculate the gravitational potential energy that they had.
The force stretching a string is proportional to the extension produced. Find the dimensions of the constant of proportionality
#340153 on Dec 2023