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Under what circumstances is the average velocity of an object equal to its instantaneous velocity?
Group of answer choices
a. only when the velocity is decreasing at a constant rate
b. never
c. always
d. only when the velocity is increasing at a constant rate
e. when the velocity is constant
A stopwatch is utilized to measure how long it takes a sprinter to run 100 meters. This stopwatch measures time intervals to hundredths of seconds. Using the stopwatch the timekeeper measures the sprinter’s time as9.88 seconds.
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. What is the mass of the apple
A skateboarder shoots off a ramp with a velocity of 5.8 m/s,directed at an angle of 54° above the horizontal. The end ofthe ramp is 1.3 m above the ground. Let the x axis beparallel to the ground, the +y direction be verticallyupward, and take as ..
Assume a linebacker collides with a stationary quarter back and they become entangled. What will occur to the velocity of the linebacker- quarterback system if the momentum is conserved?
A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius approximately 57.0 m. What is the force responsible for the centripetal acceleration in this case
identical point charges of 3.0e-6c are fixed to 3 of the 4 corners of a square. what is the magnitude q of the negative
19 g of helium gas are placed in a cylinder with a movable piston. The gas is compressed very slowly from a state of ( p1 = 5atm; v1 = 32 x 10^-3m^3) to a state of (p2 = 17atm; v2 = 9 x 10^-3m^3 )
A glass wedge is constructed to vary smoothly in thickness from zero to t = 0.200mm. What is the refractive index of the wedge
If the coefficient of static friction between the coffee cup and the roof of the car is 0.29, what is the maximum acceleration the car can have without causing the cup to slide? Ignore the effects of air resistance
The small piston of a hydraulic press has an area of 8.00 cm2. If the applied force is 25.0 N, find the area of the large piston to exert a pressing force of 3600 N
Unpolarized light with intensity 370 W/ m^2 passes first through a polarizing filter with its axis vertical, What light intensity emerges from the second filter
A 71kg student runs at 6.0m/s , grabs a hanging rope, and swings out over a lake. He releases the rope when his velocity is zero, What is the angle when he releases the rope
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