Questions about Chapter 2: Motion along a straight line.
motion of a particle traveling
along the x-axis is described by the equation
x = 20 + 4 *
x is in m and t in s.
Find the average velocity of the particle in the time interval from t = 2
s to t = 5 s
(b) Find the instantaneous velocity of the particle at t = 2 s.
ANS: (a) 28 m/s (b) 16 m/s
ball is thrown vertically upward and reaches a maximum height of 35 m.
Upon descending to the ground it rebounds with half its initial velocity.
Find the height to which it climbs after rebounding ?
stone is thrown vertically upward with a velocity of 9.8 m/s from the top of a
building whose height is 73.5 m. How
long will the stone take to reach the ground ?
stone is dropped from the top of a very tall building.
One second later another stone
is thrown vertically downward with a speed of 12 m/s.
How far below the top of the building will the second stone overtake the
A car is initially travelling in a straight line and at a speed of 100 km/hr. The driver accelerates the car at a rate of 15 m/s2 for 7 s. How far does the car travel while it is being accelerated ?
ball is thrown vertically upward with an initial speed of 8.00 m/s from a height
of 30.0 m above the ground.
When does the ball strike the ground ?
(b) Calculate the velocity of the ball just before it strikes the ground.
stone is dropped from a bridge that is 940 m above the water.
Another stone is thrown vertically downward form this bridge 1.0 s after the
first stone is dropped.
Both stones strike the water at the same time.
How long will it take the first stone to strike the water ?
What was the initial speed of the second stone?