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Q. The ceiling is of height 3.10 m, and the balloons are launched at a velocity of 9.5 m/s.
The acceleration of gravity is 9.8 m/s2.
At what angle should they be launched to just graze the ceiling?
Q. Two students with vibrating 440Hz tuning forks walk away from each other with equal speeds. How fast must they walk so that they each hear the frequency of 433 from the other fork?
Keep in mind that the speed of sound is 343 m/s.
Three astronauts, propelled by jet backpacks, push and guide a 114 kg asteroid toward a processing dock, exerting the forces, with F1 = 32 N, F2 = 52 N, F3 = 39 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle (measured relative ..
A box of books weighing 397 N is shoved across the floor by a force of 543 N exerted downward at an angle of 37 degrees below the horizontal.
The leg and cast weigh 177N (w1). Find out the weight w2 and the angle α required so that no force is exerted on the hip joint by the leg plus cast.
If you weigh 690 {rm N} on the earth, what would be your weight on the surface of a neutron star that has same mass as our sun and a diameter of 21.0 {rm km}.
While a force of 6.0 N is applied, pulling the spring to the right, the elongation of the spring is 0.030m from its equilibrium position. What is the force constant of the spring
A helicopter is ascending vertically with a speed of 5.57. At a height of 124 above the Earth, package is dropped from a window. How much time does it take for the package to reach the ground?
What is tension T in each of the cables
Two point charges, q1= 2.40 nC and q2= -6.50 nC, are 0.100 m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2 (see the attachment). Take the electric potential to be zero at infinity.
A spring with spring constant k = 210N/m is at first compressed x = 1.90 cm. It is now allowed to relax back to its equilibrium length and then it is stretched an additional 2.30 cm. How much work is completed by the spring during this process.
Compute the horizontal distance
Illustrate a basketball momentum vectors
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
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