Physics Force & Laws Of Motion Level: Misc Level
The figue is a sketch of two carts rest next to each other. A spring in one cart is released and sends the carts flying apart
a) is momentum conserved? Prove it.
b) What is the total kinetic energy after the" explosion"
c) The K E ( Before) was 0: they were not moving. Where did the K E ( After) come from?
Physics Force & Laws Of Motion Level: Misc Level
A bow exerts a force of 25 N on a 100. g arrow for 0.46 s. As it leaves the bow the arrow has a velocity of 115 m.
a) What impulse was given to the arrow?
b) What change in momentum did the arrow have, in kg. m /s?
c) using algebra show that the equation impulse =change in momentum is just another form of Newton s Second Law equation.
Physics Kinematics Level: Misc Level
A driver spring upward from a board that is 3 m above the water. At the instant she contacts the water her speed is 8.90 m m/s and her body makes an angle of 75.0 degree with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and direction.
Physics Vectors Level: Misc Level
A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 162 km away. The radar antenna is pointing upward at an angle of 62.3 degree from the ground. Find the x and y components ( in km ) of the position of the satellite.
Physics Relativity Level: Misc Level
On a pleasure cruise a boat is traveling relative to the water at a speed of 5.0 m/s due south. Relative to the boat, a passenger walks toward the back of the boat at speed of 1.5 m/s.
a) What is the magnitude and direction of the passenger s velocity relative to the water ?
b) How long does it take for the passenger to walk a distance of 27 m on the boat?
c) How long does it take for the passenger to cover a distance of 27 m on the water?
Physics Kinematics Level: Misc Level
A baseball is hit into the air at an initial speed of 36.6 m /s and an angle of 50.0 degree above the horizontal. At the same time, the center fielder starts running away from the batter and catches the ball 0.914 m above the level at which it was hit. If the center fielder is initially 1.10x102 m from home plate, what must be his average speed?
Physics Kinematics Level: Misc Level
In the javelin throw at a track and field event, the javelin is launched at a speed of 29 m/s at an angle of 36 degree above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is required for the angle to be reduced from 36 degree at launch to 18 degree?
Physics Kinematics Level: Misc Level
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 60.0 degree above the horizontal. The rocket is fired toward an 11.0 -m high wall, which is located 27.0 m away. By how much does the rocket clear the top of the wall.
Physics Kinematics Level: Misc Level
Suppose the water at the top of Niagara Falls has a horizontal speed of 2.7 m /s just before it cascades over the edge of the falls. At what vertical distance below the edge does the velocity vector of the water point downward at a 75 degree angle below the horizontal?
Physics Kinematics Level: Misc Level
A major - league pitcher can throw a baseball in excess of 41.0 m /s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release?
Physics Kinematics Level: Misc Level
In a skiing event, skiers speed down a ramp that slopes sharply upward at the end. The sharp upward slope launches them into the air, where they perform acrobatic maneuvers. In the women s competition, the end of a typical launch ramp is directed 63 degree above the horizontal. With this launch angle, a skier attains a height of 13 m above the end of the ramp. What is the skier s launch speed?
Physics Kinematics Level: Misc Level
A car drives straight off the edge of a cliff that is 54 m high. The police at the scene of the accident note that the point of impact is 130 m from the base of the cliff. How fast was the car traveling when it went over the cliff?
Physics Kinematics Level: Misc Level
A basket ball player's fans claim that he is able to jump and remain in the air for two full seconds from launch to landing. Evaluate this claim by calculating the maximum height that such a jump would attaining. For comparison, the players maximum jump height has been estimated at about one meter.
Physics Kinematics Level: Misc Level
A rock climber throws a small first aid kit to another climber who is higher up the mountain. The initial velocity of the kit is 11 m/s at an angle of 65 degree above the horizontal. At the instant when the kit is caught, it is traveling horizontally, so its vertical speed is zero. What is the vertical height between the two climbers?
Physics Kinematics Level: Misc Level
A volleyball is spiked so that it has an initial velocity of 15 m/s directed downward at an angle of 55 degree below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?
