Physics Kinematics Level: High School
Three dimensional
An electrons position is given by r = 2.00 t i – 7.00 t2 j + 4.00 k , with t in seconds are r in meters .a) In unit vector notation , what is the electrons velocity v(t) ? (Answer in terms of i,j,k and t)
b) What is v in unit-vector rotation at t = 5.00 s ?
c) What is the magnitude of v at t = 5.00 s ?
d) What angle does v make with the positive direction of the x axis at t = 5.00 s ?
Physics Kinematics Level: High School
Two dimension
A train moving at a constant speed of 51.0 km/h moves east for 48.0 min , then in a direction 40.0 degrees east of due north for 23.0 min , and the west for 75.0 min , What is the average velocity of the train during this run ?
Physics Kinematics Level: High School
Projectile
A small ball rolls horizontally off the edge of a tabletop that is .5m high . It strikes the floor at a point 1.7 m horizontally from the table edge .(a) How long is the ball in the air ?
(b) What is its speed at the instant it leaves the table ?
Physics Kinematics Level: High School
Two dimension
A stone is catapulted at time t = 0 , with an initial velocity of magnitude 20.0 m/s and at an angle of 30 degrees above the horizontal . What are the magnitudes of the(a) horizontal and
(b) vertical component of its displacement form the catapult site a t = 2.10 s
Physics Vectors Level: High School
Three vectors have magnitude a = 3.00 m , b = 4.00m , c = 30 degrees . What area) the x component and
b) the y component of vector a,
c) the x component and
d) the y component of vector b and ,
e) the x component and ,
f) the y component of vector c .
Physics Vectors Level: High School
Three vectors are given by a (with a line on top) = 3e+2j+3k, b= 4i-2j-k and c(with a line on top)=2j=2j=k , Finda) vector a times (vector b times vector c )
b) vector a times (vector b plus vector c )
Physics Kinematics Level: High School
An electron moving along the x axis has a position given by x = (4t^2)- 64t m, where t is in seconds . How far is the electron from the origin from it momentarily stops ?
Physics Measurements Level: High School
A planet Vanguardeous Lioness is a sphere of radius 7.30 x 10^6 m . What area) its circumference in meters
b) its surface are in square meters
c) its volume in cubic meters ?
Physics Gravitation Level: High School
The heliocentric model of the solar system gained preference over the early Greek model using epicycles because.a) The heliocentric model gave a more accurate description of observed planetary motion .
b) Only the heliocentric model could explain retrograde motion .
c) The heliocentric model was simpler .
Physics Gravitation Level: High School
Suppose a planet has a mass of 100 times that of the earth and a radius , which is ten times that of earth . The acceleration of gravity on the surface of the planet , expressed in units of the earth’s acceleration of gravity , g , isa) g.
b) 10 g.
c) 100 g.
d) 1/10 g.
e) 1/100 g.
Physics Kinematics Level: High School
The acceleration of a body can be obtained from the slope of graph plotting .a) Displacement versus time
b) Velocity versus time
c) Velocity versus displacement
d) Time versus displacement
e) Time versus velocity
Physics Kinematics Level: High School
A ball is thrown upward , reaches its highest point and then falls back . Which of the following is the correct statement ?a) Throughout its motion the velocity is zero .
b) Throughout its motion the acceleration is zero .
c) At the highest point in its motion the velocity is zero .
d) At the highest point in its motion the acceleration is zero .
Physics Kinematics Level: High School
For a body moving with constant acceleration , which of the following graphs will give a straight line ?a) Displacement versus time
b) Velocity versus time
c) Displacement versus velocity
d) Time versus velocity
e) Velocity versus displacement
Physics Measurements Level: High School
A boy scout off a distance of 110 steps . If each step is 75 cm , which is the distance in meters ?a) 8250 m
b) 825 m
c) 82.5 m
d) 8.25 m
e) 185 m
Physics Units Level: High School
The principal reason that scientists use metric units rather than English units is thata) Metric units are more convenient sizes
b) Conversions between units is easier .
c) metric units are more familiar.