A 500-kg cannon fires a 4. 0-kg projectile with a velocity of 500 m/s relative to the ground. What is the recoil speed of the cannon?.
Which letter shows the most potential energy of the cart? Explain why it has the most potential energy.(55 points)
A 6 kg blue ball rolls across the ground and collides with a stationary 1 kg red ball. Before the collision the blue ball moved right with a speed of 4 m/s, and after the collision it moved left with a speed of 1 m/s. If the red ball was not moving before the collision, how fast is it moving after the collision?
An object with a heat capacity of 3. 40×103j∘c absorbs 54. 0 kj of heat, beginning at −25. 0∘c. What will be the final temperature of the object?.
Calculate the heat capacity of 1,343 g of lead, given that 45 j is needed to raise the temperature by 29. 8 ∘c.
A 1. 2-kg spring-activated toy bomb slides on a smooth surface along the x-axis with a speed of 0. 50 m/s. At the origin 0, the bomb explodes into two fragments. Fragment 1 has a mass of 0. 40 kg and a speed of 0. 90 m/s along the negative y-axis. In the figure, the angle θ, made by the velocity vector of fragment 2 and the x-axis, is closest to.
A moon of mass 1×1020 kg is in a circular orbit around a planet. The planet exerts a gravitational force of 2×1021 n on the moon. The centripetal acceleration of the moon is most nearly.
assuming it takes the space shuttle about 8 hours from entry into orbit until landing, what is the largest circular aperture created by a hull puncture that can be safely tolerated assuming that the flow of gas out of the spaceship is effusive? express your answer to one significant figure and include the appropriate units.
the maker of an automobile advertises that it takes 13 seconds to accelerate from 25 kilometers per hour to 80 kilometers per hour. assume the acceleration is constant. (a) find the acceleration in meters per second per second. (b) find the distance the car travels during the 13 seconds.
during a lunar mission, it is necessary to increase the speed of a spacecraft by 2.2 m/s when it is moving at 400 m/s relative to the moon. the speed of the exhaust products from the rocket engine is 1000 m/s relative to the spacecraft. what fraction of the initial mass of the spacecraft must be burned and ejected to accomplish the speed increase?
student exploration: free-fall laboratory directions: follow the instructions to go through the simulation. respond to the questions and prompts in the orange boxes. vocabulary: acceleration, air resistance, free fall, instantaneous velocity, terminal velocity, velocity, vacuum prior knowledge questions (do these before using the gizmo.) suppose you dropped a feather and a hammer at the same time. which object would hit the ground first? the hammer
a 15-g bullet strikes and becomes embedded in a 1.24 kg block of wood placed on a horizontal surface just in front of the gun. if the coefficient of kinetic friction between the block and the surface is 0.28, and the impact drives the block a distance of 11.0 m before it comes to rest, what was the muzzle speed of the bullet?
if a planet with 9.9 times the mass of earth was traveling in earth's orbit, what would its period be (in years)?
calculate the impulse experienced when a 63 kg person lands on firm ground after jumping from a height of 3.1 m .
