4840

Physics Kinematics Level: Misc Level

A ship maneuvers to within 2.50 x 10 ^3 m of an island s 1.80 x10 ^3 mountain peak and fires a projectile at an enemy ship 6.10 x10 ^2 m on the other side of the peak, as illustrated below. If the ship shoots the projectile with an initial velocity of 2.50 x10 ^2 m /s at an angle of 75.0, how close to the enemy ship does the projectile land? How close ( vertically ) does the projectile come to the peak?


4839

Physics Kinematics Level: Misc Level

A place kicker must kick a football from a point 36.0 m (about 40.0 yd) from the goal. As a result of the kick, teh ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 20.0 m /s at an angle of 53 to the horizontal. A)by how much does the ball clear or fall short of clearing the crossbar? B) Does the ball approach the crossbar while still rising or while falling?


4838

Physics Kinematics Level: Misc Level

The fastest recorded pitch in baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reached home plate, 18.3 m(60ft) away. How fast was Ryan s pitch?


4824

Physics Kinematics Level: Misc Level

You kick a soccer ball from level ground so that it will reach its maximum range Rmax. How high is the ball when it horizontal distance from the starting point is (3 /4) R max. Again find symbolically.


4823

Physics Kinematics Level: Misc Level

You and two of your friends decide to have a race. You each start from the center of a circle and travel out along different radii at the same time. One of you moves with a constant speed of v1, the second starts from rest and moves with a constant acceleration a, and the third, moving with an initial speed v2, decelerates with constant acceleration -a. Show that if all of you reach the outside of the circle (meaning the same distance away from the center) at the same time then v2 =2v1. Find the acceleration symbolically.


4758

Physics Kinematics Level: Misc Level

A ball is thrown upwards with an initial speed of 80 ft /sec. a) how high does it go? B) What is its speed at the end of 3 sec? c) How high is it after 3 sec.?


4713

Physics Kinematics Level: Misc Level

A spherical steel ball of 5 kg mass rolls downhill starting from rest through a distance of 5 meters at 10 degrees to the horizontal floor. What is the velocity ( m/ s )?


4702

Physics Kinematics Level: Misc Level

A man on mars drops a rock from 3 meters if it takes 1.26 secs to fall on the surface what is the accelration of gravity?


4682

Physics Kinematics Level: Misc Level

Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.00 m/s. How long would it take to reach the ground if it is thrown straight down with the same speed.


4681

Physics Kinematics Level: Misc Level

A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.0 m /s and her takeoff point is 1.80 m above the pool /

a) What is her velocity when her feet hit the water?


4680

Physics Kinematics Level: Misc Level

A basketball referee tosses the ball straight up for the starting tipoff. At what velocity must a basketball player leave the ground to rise 1.25 m above the floor in an attempt to get the ball?


4679

Physics Kinematics Level: Misc Level

An express subway train passes through an underground station. If enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s 2 as it goes through. The station is 210 m long.

a) if the train is 130 m long, when does the end of the train leave the station?

b) What is the velocity of the end of the train as it leaves the station?


4640

Physics Kinematics Level: Misc Level

A ski slope is 1.2 kilometers long and is inclined at 13 degrees from the horizontal. A person begins at the top of the slope (assumed to be smooth) and accelerates down wards. Find the time it takes for the person to travel the slope.


4604

Physics Kinematics Level: Misc Level

Which takes longer to run at constant speed -a 100 m dash or a 100 yard dash? Explain.


4573

Physics Kinematics Level: Misc Level

A child on a sled on a frictionless snowy hill of height 30 m has an initial potential energy of 9000 N. The child slides down the hill. When she reaches a height of 10 m what is her kinetic energy


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