Physics Ray Optics Level: High School
The study of rainbows would fall under what subfield of physics ?a) Mechanics
b) Thermodynamics
c) Electricity and Magnetism
d) Optics
e) Atomic Physics
Physics Force & Laws Of Motion Level: High School
A 75 kg man is in an elevator that is accelerating downward at the rate of 1.5 m/s .a) What is the true weight of the man in Newton’s ?
b) What is the net force acting on the man required to produce the acceleration ?
c) What is the apparent weight of the man in Newtons ?
d) What is the force on the man’s feet by the floor of the elevator ?
Physics Force & Laws Of Motion Level: High School
A racecar rounds a curve at 80 m/s . The radius of the curve is 400 m and the mass of the car is 1500 kg .a) What is the car’s centripetal acceleration ?
b) What is the net force on the car ?
Physics Force & Laws Of Motion Level: High School
The engine of a car is part of the car and cannot push directly on the car to accelerate it . Explain what external force acting on the car is responsible for the acceleration of the car .Physics Kinematics Level: High School
A mile is 5280 feet . How many centimeters are there in a mile ?Physics Kinematics Level: High School
A boy throws a ball . It starts from rest and reaches a speed of 25 m/s in 0.25 s . What is the acceleration of the ball ?Physics Kinematics Level: High School
A car is traveling at 50 m/s and a jet is traveling at 450 m/s . How far will thea) car travel in eight seconds ?
b) jet travel during that same time interval ?
Physics Kinematics Level: High School
Relative velocity
A basketball player is running down the court at 8 m/s in a northern direction; she throws the ball to her right at a velocity of 15 m/s in the eastern direction .a) What is the velocity (speed and direction) of the ball relative to the court ?
b) Draw a vector diagram
Physics Kinematics Level: High School
Suppose a certain football player can run 100 m in 10.3 s ; what is his average speed in m/s ?Physics Gravitation Level: High School
Europa , one of Jupiter’s moons , has an average distance of 6.7 x 10^6 km from the center of the planet (circumference equals 2 pi r) . Its orbital period is 3.6 days . In metric units , what is Europa’sa) Orbital speed
b) Acceleration
Physics Kinematics Level: High School
One dimension
A suicidal maniac jumps out of a perfectly good airplane . He falls to four seconds before opening his parachute .a) What is the downward speed jus before the chute opens (ignore the effects of air resistance) ?
b) How far below the airplane does he fall before he opens the chute ?
Physics Force & Laws Of Motion Level: High School
If a curve with a radius of 80 m is perfectly banked for a car traveling 70 km/h , What must be the coefficient of static friction for a car not to skid when traveling at 90 km/h ?Physics Kinematics Level: High School
A sailboat tacking against the wind moves as follows ? 5.8 km at 45 degrees east of north . and then 4.5 km at 50 degree west of north . The entire motion takes 1h 15 Min .What is the total displacement ?
What is the average velocity of this section of the trip ?
What is the speed , if it is assumed to be constant ?
Physics Vectors Level: High School
A ship moves 10.2 km due east , and then 5.9 km due north . what are the magnitude and the direction of the resultant displacement vector ?Physics Kinematics Level: High School
The muzzle speed of a 22 caliber bullet fired from a rifle is 360 m/s . If there were no air resistance , how high would this bullet rise when fired straight up ?