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. The stone with a mass of 200g is thrown up with an initial velocity V0 = 6 m / s. á) What happens to the Impulse during climbing, increases or decreases? Why? b) Calculate the change in momentum as the stone reaches its greatest height.
Hitting the hammer with the nail lasted delta t = 0.05 s. Calculate the impact force that acted on the nail, when it is known that the impulse of the hammer changed with delta p = 20 kgm / s.
The elastic stroke of the ping pong ball with a marble slab lasts delta t = 0.02 s. Calculate the impact force, knowing that the velocity of the strike ball was vo = 5 m / s.
The force F = 50 N acts on the material point. Find the change of its pulse over a time delta t = 2 s. What path has the subject point traversed during this time? Its mass is m = 600 g, while the initial velocity was v = 2m / s.
A racing car passes through the horizontal turn at a speed of 180 km / h. Calculate the mass of the car, when it is known that the centripetal force at the sliding threshold is 15000 N, at the turning radius 200 m. Determine the coefficient of sliding friction.
A spacecraft of mass 25 t flies in infinite space and under the action of constant reactive force traverses 2000 km of path for 30 min. Calculate the reactive force, when it is known that at the moment of starting the engines the speed of the ship (in relation to the center of the Galaxy) was Vo = 1500 km / s.
a driver traveling 70 mph takes his foot off the accelerator, what transfer of energy tales place
The boy throws the ball vertically, with speed v0 = 4m / s. The mass of the ball is m = 800 g. a) What impulse is communicated to the boy and the cart while throwing the ball? D) Why does the boy and the cart not move? Who hinders them? c) Knowing that the interaction of the boy with the ball during the throw lasts delta t = 0.045 s, calculate the additional compressive force exerted on the ground during this time.
Shown is the boy riding on a cart, throwing the ball horizontally with speed v1 = 5 m / s. Find the speed of the cart after throwing the ball, when it is known that the mass of the ball is m1 = 500 g, while the mass of the boy together with the mass of the cart is m2 = 70 kg. At first the cart was at rest. The frictional forces between the cart and the ground are not taken into account
The stone rotates in a circle with velocity v = 5 m / s. Find the correct statement: a) The impulse does not change because the mass and the value of the velocity do not change. b) Impulse changes because the direction of velocity changes
