Physics Kinematics Level: Misc Level
A car with an initial velocity of 3.5 m/s coasts with the engine off and the transmission in neutral. If the combined effect of air resistance and rolling friction causes a constant deceleration of 0.50 m/s2, after how long a time will the car come to a stop?
Physics Kinematics Level: Misc Level
You can determine the speed of the car by measuring the time it takes to travel between mile markers on a highway.
a. How many seconds should elapse between two consecutive mile markers if the car s average speed is 65 mi/hr?
b. What is the car s average speed if it takes 65 s to travel between the mile markers?
Physics Kinematics Level: Misc Level
Consider two falling bodies. Their masses are 4.2 kg and 6.6 kg. At time t =0, the two are released from rest. What is the velocity of their center of mass at t = 4.0 s? lgnore air resistance.
Physics Kinematics Level: Misc Level
A 0.330 - kg volleyball is thrown vertically downward with a speed of 0.150 m/s. It takes it 0.0655 s to reach the ground. What is the magnitude of its momentum just before it hits the ground?
a. 0.212 kg x m/s
b. 0.262 kg x m/s
c. 0.163 kg m/s
d. 0.0216 kg x m/s
Physics Kinematics Level: Misc Level
A baseball player fields a ground ball and attempts to make a 230 ft throw to home plate. Given that player commonly makes long throws at 90 mph, find the two possible angles at which he can throw the ball to home plate. Find the time saved by choosing the smaller angle.
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 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?
