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- NASA launches the Perseverance on its journey to Mars. If the rocket is moving with a constant acceleration of 105 m/s2, how long will it take to travel 7400 m?
Formula: x = x0 + v0t + ½ at2
- A person riding Nitro at Six Flags experiences an acceleration of 5.6 m/s2. As a result, it accelerates from rest to 37.4 m/s. How much distance did the person travel during that acceleration?
Formula: v2 = 2ax
- An object accelerates from rest to a speed of 27 m/s over a distance of 62 m. What acceleration did it experience?
Formula: v2 = 2ax
- An object accelerates from rest with a constant acceleration of 9.5 m/s2. How fast will it be traveling after it goes 25 m?
Formula: v2 = 2ax
What is the velocity of a dropped object after it has fallen for 5.0s?
Formula: v = v0 +gt
An arrow is launched straight up with a final velocity of 25.6 m/s. How long before the arrow returned to the ground?
Formula: t = ( v – v0)
g
A book bag is thrown straight up from the ground with an unknown velocity. It reaches its highest point after 6 s. With what initial velocity did it leave the ground? (Equation 4)
Formula: v0 = v -gt
Doug the Talking Dog spots a squirrel. He accelerates from rest with a constant acceleration of 8 m/s2. How far will he have moved after 17s?
Formula: x = x0 + v0t + ½ at2
x = ½ at2
x = ½ (8)(17)2
What is spin-orbit interaction in atomic? explain.
A police car of mass 2.4x103kg is travelling on the highway when the officers receive an emergency call. They increase the speed of the car to 33 m/s. The increase in speed results in 3.1 x 10 5 J of work done on the car. Determine the initial speed of the police car in kilometers per hour?
In the circuit below V1 = V4, Vsource = 50 V, R1= 100 ohms, R2 = 2 R3,
and Isource = 0.250 A, and 2I2 = 3 I4.
a) what are the values of R4, I1, I2, and I4?
b) What are the values of V2 and V3 ?
A 150-g piece of iron at 3000C is submerged in 250 g of water at 100C to be cooled quickly.
Determine the final temperature of the iron and the water. [ 5 marks]
[ Cw = 4.18x103 J/kg0C and Ciron= 4.5 x 102J/kg0C]
A portable heater is plugged into a 120-V outlet and draws a current of 8.0 A for 10.0 min. Calculate each of the following:
a) the quantity of electric charge that flows through the heater
b) the energy consumed by the heater
c) the power dissipated by the heater
A golf ball is launched from the roof of a school with a velocity of 20 m/s at an angle of 300 above the horizontal. If the roof is 40 m above the ground, calculate:
a) the ball’s time of flight
b) the ball’s horizontal displacement
The first resonant length of a closed air column occurs when the length is 16 cm.
a) What is the wavelength of the sound?
b) If the frequency of the source is 512 Hz, what is the speed of sound?
Two people are fishing from small boats located 28 m apart.Waves pass through the water, and each person’s boat bobs up and down 15 times in 1.0 min. At a time when one boat is on a crest, the other one is in a trough, and there is one crest between the two boats. What is the speed of the waves?
