Physics Kinematics Level: High School
Projectile Motion
A B.B of mass m is moving horizontally with speed Vo when it hits and ice cube of mass 10 m that is at rest on horizontal frictionless stool . The surface of the stool is a height h above the floor . After the impact the B.B and the ice cube slide off the stool and hit he floor a distance x from the edge of the stool . Derive expressions for the following quantities in terms of m, h, Vo, and appropriate constants .a) the speed of the block as it leaves the stool
b) the distance x
Suppose that the B.B passes through the ice cube instead of remaining in it .c) State whether the time required for the ice cube to reach the floor from the edge of the stool would now be greater , less , or the same . Justify your answer.
d) State whether the distance x for the ice cube would now be greater , less , or the same . Justify your answer.
Physics Kinematics Level: High School
Projectile Motion
A laser is shot with an initial speed of 75 m/s at a launch angle of 35 degrees from the horizontal towards and energy shield 250 m away . The height of the shield is 40 m . Assume that the effects due to air are negligible .a) How long after the laser is launched does it arrive at the shield ?
b) Does the laser strike the shield ? If it does , how high up does it strike the shield ? If it misses , doe sit fall short or does it pass over the shield ?
c) Assume only the launch angle may be varied , determine what launch angles will allow the laser to just clear the top of the energy shield ?
Physics Kinematics Level: High School
Projectile Motion
Derek Jeter hits a baseball 1 m above the plate, launching the ball off at an angle of 30 degrees . The ball just makes it over the 10 m fence that reads 104 m . Find the initial velocity of the ball .
Physics Kinematics Level: High School
Projectile Motion
A projectile carrying a bomb is launched from the ground at an angle of 50 degrees . It accelerates from rest from the first 3 seconds at 3m/s^2 . At time t = 3 s the bomb drops to the ground , while the projectile continues to accelerate at 3m/s^2 . What is the vertical distance between the projectile and the bomb at the bombs initial impact with the ground ?
Physics Kinematics Level: High School
One dimension
A student had a normal reaction time of 0.760 sec . Due to self induced chemic impairment their reaction time is increased to 0.946 sec . Driving at 24.5 m/s they see a DWI checkpoint 50.0 m ahead . If breaking acceleration of the car is 10.0 m/s^2 . can they stop before the checkpoint ?
Physics Kinematics Level: High School
One dimension
A student rolls a ball down a ramp and measures the displacement andtime os fthe rolling ball . They plot a d/t2 graph and calculate the slope of the graph to be 3.64 m/s .a) How much time would it take the ball to roll 1.86 m ?
Physics Kinematics Level: High School
One dimension
A ball is thrown downward w/an initial velocity of 12.6 m/s from a height of 17.3 ma) How fast was it going when it is hit the ground ?
Physics Kinematics Level: High School
One dimension
An object thrown upward w/an initial velocity of 16.8 m/sa)After 2.00 sec . is it still going up , or is it going down .
b) How fast was it going when it hit the ground ?
Physics Kinematics Level: High School
Relative Motion
The water current in a river moves relative to the land with a velocity vwl, and a boat is traveling on the river relative to the current with a velocity vbw.1) How is the velocity of the boat relative to the land (vbl) related to vwl , and vbw ?
2) Assume that the boat travels with a speed of 4.0 km/h relative to the current and that the current moves due east at a speed of 2.0 km/h relative to the land . Determine the velocity of the boat relative to the land for each of the situations described in items 2-4 .
A) Suppose that both the boat and the water current moves in the same direction and that ht boat is moving twice as fast as the current . Draw a vector diagram to determine the velocity of the boat relative to the land , vbl .
B) Suppose that the boat travels in the opposite direction of the current and that the boat is moving twice as fast as the current . Draw a vector diagram to determine the velocity of the boat relative to the land , vbl .
C) Suppose that the boat travels in a direction perpendicular to the current and that the boat is moving twice as fast as the current . Draw a vector diagram to determine the velocity of the boat relative to the land , vbl .
Physics Kinematics Level: High School
Projectile Motion
A baseball leaves the bat with a speed of 44 m/s at an 30 degrees above the horizontal . A fence is located at an horizontal distance 132 m from the point where the ball was stuck . At what height above the ground will the ball hit the fence . Assume the ball leaves the ground 1.0 m above ground level and neglect air resistance .
Physics Kinematics Level: High School
Projectile Motion
A rock is projected from the edge of the building with an initial velocity of 12.2 m/s at an angle 53 degrees above the horizontal . The rocks strikes the ground horizontal distance 25.0 cm from the base of a building . Assume the ground is level and the side of the building is vertical , How tall is the building ?
Physics Kinematics Level: High School
Projectile Motion
A place kicker kicks a football with a speed 25.0 m/s at an angle 50 degrees to the horizontal . What is the velocity of the football at the highest point in the trajectory . Neglect air resistance .
Physics Kinematics Level: High School
One dimension
A particle starts from rest at x = 0 and moves for 10 sec with an a = +2.0 cm/s squared . For the next 20 sec , the a = -1.0 cm/s squared . What is the position of the particle at the end of this motion in m ?
Physics Kinematics Level: High School
One dimension
A rocket initially at rest is fired vertically with an acceleration of 10 m/s^2 . At an altitude of .78 km , the engine of the rocket cuts off . What is the maximum altitude it achieves ?
Physics Kinematics Level: High School
Projectile motion
A bullet is fired horizontally on the moon at a velocity of 1200 m/s from a gun 2.0 meters above the surface . How far in meters will the bullet travel before it hits the ground ? The acceleration due to the moon’s gravity is 1.6 m/s and the average distance from the earth to the moon is 380,000 km .