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A 50 g rock is launched vertically in the air by a slingshot. The slingshot exerts an average force of 53 N on the rock over a distance of 0.750 m.
- Find the maximum height reached by the rock in [m].
- Find the speed of the rock as it leaves the slingshot in [m/s]?
A pellet is fired from an air rifle with a horizontal velocity into sand in a stationary toy truck. The truck then takes off in a horizontal direction on a frictionless runway.
a) State whether or not momentum is conserved.
b) Explain your answer in (a) above.
what is the resultant of displacement of 6 miles north and 9 miles east?
A. What is the rotational inertia of the pulley?
Is hydraulic press against the law of conservation of energy? As we see output is greater than input... energy is equal to work done,, which is equal to the dot product of work and distance...now in case of smaller piston force is smaller while in case of larger piston (having large Cross section area) force is very large conparitively,,, displacement of piston renains same in both cases,,then in this way its violating law of conservation of energy...how could we justify law of conservation of energy in hydraulic press???
A. How much work is done by the gravitational force on the meteor as it falls from very far away (infinite distance) to some height h above Earth's surface?
Express your answer in terms of some or all of the variables mm, C, mass of Earth mE, its radius RE, and h.
B.
If the meteor is moving very slowly when it is very far away, how fast is it moving when it gets to that height?
Express your answer in terms of some or all of the variables mm, C, mass of Earth mE, its radius RE, and h.
Vm=?
#339914 on Dec 2023