math
posted by clara
Which three options are true about motion in a straight line.
A. A particle which moves at an increasing velocity has a constant acceleration.
B. If two particles always have the same velocity as each other, their separation does not change.
C. A particle which has zero acceleration moves with constant velocity or is stationary.
D. A particle with negative position must have had a negative acceleration in the past.
E. The acceleration of any subject is 9.8m s^2
F. A particle which moves with a constant acceleration also has a constant velocity.
G. An object which is dropped and falls only under gravity accelerates downwards at approximately 9.8m s^2
H. Velocity is the magnitude of the speed.
I think b and h??
A, C, G are the answers.
i thought H? Velocity is the magnitude of the speed?
Can you explain why A, C & G. Please, so I can understand
C, G and H are true. A is not true.
Respond to this Question
Similar Questions

maths
Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not … 
math
Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not … 
Chels
What can you say about the motion of a body if its veloctiytime graph is a straight line inclined with the time axis? 
math
What is true for motion in a straight line. A. if a vechile has zero velocity , it must be stationary. B.the graph of position against time has to be a straight line. C.acceleration is the rate of change of speed. D.velocity is the … 
math(mechanics)
the acceleration of a particle as it moves along a straight line is given by a=(2t1)m/s^2, where t is in seconds.if s=1m and v= 2m/s when t=0,determine the particles velocity and position when t=6s. Also, determine the total distance … 
Physics true false
true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be nonzero when its speed is constant. … 
physics
A body starts with an initial velocity of 10m/s and moves along a straight line with a constant acceleration. When the velocity of the particle becomes 50 m/s the acceleration is reversed in direction without changing magnitude. Find … 
physics
a particle with velocity of 2m/s at t= 0 moves along a straight line with constant acceleration of 0.2m/s2. find the displacement of the particle in 10 seconds 
Physics
Pease evaluate the statements by choosing from these three statements Always true: the statement is true under any circumstances Not necessarily true: the statement may be true in some circumstances, but not in others Always false: … 
Physics
1. Which statement below is true? a. If a car is traveling eastward, its acceleration is eastward. b. If a car's speed is decreasing, its acceleration must be negative. c. If a particle is moving, it must have a nonzero acceleration.