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Q. What is the velocity of 5.5kg object with a force of 2.5N when it reaches 6.0 meters, assuming the velocity at zero meters is zero?
Q. A 2020-kg elevator accelerates upward at 1.8 m/s2. What is the tension in the cable that supports the elevator?
A 370-kg sailboat has an acceleration of 0.87 m/s2 at an angle of 64° north of east. Find the magnitude and direction of the net force that acts on the sailboat.
A 180 g block on a 49 cm-long string swings in a circle on a horizontal, frictionless table at 74 rpm.
The electricity received at an electric substation has a potential difference of 2.80 10^5V. If the requires output is 440V, what must be the ratio of the turns of the step-down transformation.
As part of a safety investigation, two 1200 {rm kg} cars traveling at 24 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.80 {rm s} to stop, and (b) car that hits a..
A carbon sample of the same size taken from a fresh piece of bone emits 16 beta emissions a minute. How long ago did the saber-tooth tiger live?
If a violin string transmits waves at 375 m/s and has 295 Hz as its fundamental frequency, what is the string's length.
A 30.0 capacitor initially charged to 30 is discharged by a 1.40 resistor. How long does it take to reduce the capacitor's charge to 2.00.
A ferrari race car on the straight road starts from rest, accelerating at 2.00 m/s^2 until it reaches a speed of 20.0m/s. Then the car travels for 20.0 s at the constant speed until the brakes are applied, stopping the truck in a uniform manner in an..
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s. What is the frequency heard by the observer? Imagine the speed of sound in air to be 340 m/s.
On an amusement park ride, passengers are seated in the horizontal circle of radius 6.5 m. The seats begin from rest and are uniformly accelerated for 24 seconds to a maximum rotational speed of 1.4 rad/s.
While a roofer is working on a roof that slants at 39.0 degrees above the horizontal, he accidentally nudges his 93.0 N toolbox, causing it to start sliding downward, starting from rest.
A robot probe drops a camera off the rim of the 389 m high cliff on Mars, where the free fall acceleration is 3.7 m/s^2. Find out velocity with which it hits the ground and the time required for it to reach the ground.
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