Chapter 2
1D-Horizontal Motion Practice
Steps for problem solving:
1) Visualize problem by drawing a simple diagram
2) Identify the variables given (look at the units) and the unknown variable
3) Select the appropriate formula; write it down without substituting yet
4) Now substitute the given variables; first show work for any conversions
5) Perform algebraic calculations
6) Report answer with appropriate units, then circle; if answer is not correct, look back at work and try something else.
Problems
1. A cart is given an initial velocity of 5.0
m/s and experiences a constant acceleration of 2.0 m/s2. What is the
magnitude of the cart’s displacement during the first 6.0 s of its motion?
66m
2. A vehicle designed to operate on a drag
strip accelerates from zero to 30
m/s while
undergoing a
straight line path displacement of 45 m. What is the vehicle’s
acceleration if its value may be assumed
to be constant?
10 m/s2
3.When a drag
strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration
by releasing a drag chute and applying its brakes. While reducing its velocity
back to zero, its acceleration along a straight line path is a constant -7.5
m/s2. What displacement does it undergo during this deceleration
period?
240 m
4.
A bird, accelerating from rest at a constant rate, experiences a displacement
of 28 m in 11 s. What is the the final velocity after 11 s?
5.1 m/s
5.
A bird, accelerating from rest at a constant rate, experiences a displacement
of 28 m in 11 s. What is its
acceleration?
0.46
m/s2
6.
A European sports car dealer claims that his car will accelerate at a constant
rate from rest to 100 km/hr in 8.00 s. If so, what is the acceleration? (Hint: First convert speed to m/s.)
3.48
m/s2
7.
A European sports car dealer claims that his product will accelerate at a
constant rate from rest to a speed of 100 km/hr in 8.00 s. What distance will
the sports car travel during the 8-s acceleration period? (Hint: First convert speed to m/s.)
111.2
m
8.
A European sports car dealer claims that his product will accelerate at a
constant rate from rest to a speed of 100 km/hr in 8.00 s. What is the speed
after the first 5.00 s of acceleration? (First convert the speed to m/s.)
17.4
m/s
9.
An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero
in
10.0 s. What distance does the car travel?
150
m
10.
A drag racer starts from rest and accelerates at 10 m/s2 for the
entire distance of
400 m (1/4 mile). What is the velocity of
the race car at the end of the run?
89.4
m/s
11. A
Cessna aircraft has a lift‑off speed of 120 km/hr. What minimum constant
acceleration does this require if the aircraft is to be airborne after a take‑off
run of
240 m?
2.31 m/s2