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A .075 Kg toy rocket is launched straight up from the ground at 19 m/s.
(A) What's its kinetic energy?
(B) Find the work done by gravity and the rocket's new kinetic energy after it has risen 10m.
(C) Use the answer in part B to find the rockets speed at 10m.
(D) Calculate the power of gravity force during the first 10s. Thanks for the help!
A cardinal (Richmondena cardinalis) of mass 3.60×10-2 and a baseball of mass 0.146 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of baseball's momentum.
Before starting this problem, review COnceptual Example 3. Suppose that hail described there bounces off the roof of the car with a velcity of +15 m/s. calculate the force exerted by the hail of the roof
a projectile is fired with an initial velocity of 35 m/s at an angle of 30 degrees above horizontal of a 30 feet tall building. find the velocity of the projectile at the ground
A uniform magnetic field is at right angles to the plane of a wire loop. The field decreases by 0.16Tin 3.0×10?3s and the magnitude of the average emf induced in the loop is 82V, What is the area of the loop
Starting from rest, a 4.4-kg block slides 2.70 m down a rough 30.0° incline. The coefficient of kinetic friction between the block, Determine the work done by the force of gravity
A 5.70 cm x 3.10 cm rectangle lies in the xy-plane, What is the electric flux through the rectangle if E = (50.0 i-hat + 60.0 k-hat) N/C
Four point charges have the same magnitude of 2.18 x10-12 C and are fixed to the corners of a square that is 3.95 cm on a side. Three of the charges are positive and one is negative. find the magnitude of the net electric field that exists at the ..
Now the gymnast (not holding any additional mass) walks directly above right support. What is the force the left support exerts on beam.
A 890kg sports car collides into the rear end of a 2500kg SUV stopped at a red light. The bumpers lock, calculates the speed of the sports car at impact
A glass window 0.45cm thick measures 80cm by 37cm. To compare the relative efficiency of air and glass as insulators, calculate the heat flows through this window
Besides the traditional colorimetric acid/base indicators, there is another class that doesn't use color, the olfactory acid-base indicators! These compounds smell or don't smell based on their pH and a lot of them are plant-derived compounds
A 75 g, 31 cm long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 12 g ball of clay travelling horizontally at 2.1 m/s hits and sticks to a very bottom tip of the rod.
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