Physics Kinematics Level: High School
A student has a car that gets , on average , 25.0 mi/gal of gasoline . She plans to spend the a year is Europe and take the car with her . What should she expect the car’s average gas mileage to be in kilometers per liter ?
Physics Kinematics Level: High School
How does mass affect the rate of acceleration in free fall in air and also in a vacuum ?
Physics Kinematics Level: High School
A ball is thrown horizontally from the cliff at a speed of 10 m/s . What is its speed one second later ?
Physics Kinematics Level: High School
Relative Velocity
If raindrops falls vertically at a speed of 3 m/s and you are running at 4 m/s , how fast do they hit your face ?
Physics Kinematics Level: High School
One dimensional
What is the acceleration of a 20-kg pail of cement that is pulled upward (not sideways) with a force of 300 n ?
Physics Kinematics Level: High School
One dimensional
A car takes 10 s to go from v = 0 m/s to v = 25 m/s at a approximately constant acceleration . If you wish to find the distance traveled using the equation d = ½ at2 , what value should you use for a ?
Physics Kinematics Level: High School
One dimensional
A relief package dropped from a hovering helicopter hit the ground 10 seconds after it was dropped . How far did it fall ?
Physics Kinematics Level: High School
One dimensional
The distance from Los Angeles to San Francisco is about 400 miles . If you make the trip in 8 hours , what is your average speed ?
Physics Kinematics Level: High School
Projectile
When a water gun is fired while being horizontally at a height of 1.25 m above the ground , the water travels a horizontal distance of 6.0 m . A child , who is holding the same gun in a horizontal position , is also sliding down a 45 degree incline at a constant speed of 2.8 m/s . If the child fires the gun when it is 2.5 m above the ground and the water takes 0.342 s to reach the ground , how far will the water travel horizontally ?
Physics Kinematics Level: High School
Projectile
A projectile is shot from the edge of a cliff 160 m above ground level with an initial speed of 110 m/s at an angle of 41 degrees with respect to the horizontal . Determinea) The time it takes for the projectile to hit the ground .
b) The range , as measured from the base of the cliff .
Physics Kinematics Level: High School
Projectile
Due to tropical storm in the ocean , a boat gets blown off course . To make things worse , the boat is filling with water . Luckily , the Coast Guard heard the beacon for help . Awaiting arrival of a helicopter , the search plane drops flotation devices . The plane is moving horizontally with a speed of 177 km/hr and is at an altitude of 220 m . How far away from the boat ( in the horizontal direction) should the plane drop the gear to get it on target of the boat ?
Physics Kinematics Level: High School
Projectile
A ship maneuvers to within 2.80 x 10^3 m of an island’s 1.35 x 10^3 m high mountain peak and fires a projectile at an enemy ship 6.65 x 10^2 m on the other side of the peak . If the ship shoots the projectile with an initial velocity of 2.25 x 10^2 m/s at an angle of 68 degrees relative to the water’s surface , how close to the enemy ship does the projectile land ? How close (vertically) does the projectile come to the peak ?
Physics Kinematics Level: High School
One dimensional
The position time equation for an object’s motion is given by the equation x = 2.2t^2+4 .a) Draw an x versus t graph for the object’s motion .
b) Find the objects average velocity from 0-5 seconds .
c) What is the object’s instantaneous velocity at t = 4 seconds .
Physics Kinematics Level: High School
One dimensional
A ball is thrown vertically upward with a speed of 25 m/s from a height of 2m off the ground .a) How high does it rise from the ground ?
b) How long does it take to reach its highest point ?
c) From the highest point , how many seconds does it take to reach the ground ?
d) Just before it hits the ground , how fast is the ball moving ?
e) Draw the vector difference between the ball’s initial velocity and its velocity 4 seconds later . Give the direction and magnitude for its difference .
Physics Kinematics Level: High School
Two dimensional
You are standing on the ground at the origin of a coordinate system . An airplane flies over you with constant velocity parallel to the x axis and at a fixed height of 7.60 x 10^3 at time t = 0 the airplane is directly above you , so that the vector leading from you to it is , P0 = (7.60 x 10^3 ) j . At t = 30.0 s the position vector leading from you to the air plane is P30 = (8.04 x 10^3 m) i + (7.60 x10^3 m)j . Determine the magnitude and orientation of the airplane position vector at t = 45.0 s .