Consider a ball thrown up from the surface of the earth into the air at an angle of 30° above the horizontal. Air resistance is negligible. Just after the ball is released, its acceleration is: a. Upwards at 9.8 m/s? b. Upwards at 4.9 m/s C. Downwards at 9.8 m/s? d. 0 m/s
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
![direction at 5 m/s, as shown below. What is the car's acceleratic
5 m/s
а. O m/s?
b. [0 m/s, 0 m/s']
C. 10 m/s
d. [-5 m/s, 5 m/s]
Consider a ball thrown up from the surface of the earth into the air at an angle of 30° above the
horizontal. Air resistance is negligible. Just after the ball is released, its acceleration is:
a. Upwards at 9.8 m/s
b. Upwards at 4.9 m/s
C. Downwards at 9.8 m/s
d. 0 m/s
. A hunter with an air blaster gun is breparing to shoot at a monkey hanging from a tree. He is pointing
his gun directly at the monkey. The monkey's got to think quickly! What is the monkey's best chance to
avoid being smacked by the rubber ball?
a. The monkey should stay right where he is: the bullet will pass beneath him due to gravity.
b. The monkey should let go when the hunter fires. Since the gun is pointing right at him, he can
avoid getting hit by falling to the ground.
C. The monkey should stay right where he is: the bullet will sail above him since its vertical velocity
increases by 9.8 m/s every second of flight.
d. The monkey should let go when the hunter fires. He will fall faster than the bullet due to his
greater mass, and it will fly over his head.
4. You are riding your bike in a straight line with a speed of 10 m/s. You accidentally drop your calculator
out of your backpack from a height of 2.0 m above the ground. When it hits the ground, where is the
calculator in relation to the position of your backpack? Neglect air resistance - note that this might
make your answer non-intuitive!
a.
You and your backpack are 6.3 m ahead of the calculator.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6c07cca6-b565-4f47-b7ee-228f550064a8%2Fe5e72c3d-f577-4344-b090-ce409713dbda%2Fcgoprak_processed.jpeg&w=3840&q=75)
![5 m/s
a. 0 m/s
b. [0 m/s, 0 m/s
C. 10 m/s
d. [-5 m/s, 5 m/s*
Consider a ball thrown up from the surface of the earth into the air at an angle of 30° above the
horizontal. Air resistance is negligible. Just after the ball is released, its acceleration is:
a. Upwards at 9.8 m/s?
b. Upwards at 4.9 m/s?
C. Downwards at 9.8 m/s
d. 0 m/s?
B. A hunter with an air blaster gun is breparing to shoot at a monkey hanging from a tree. He is pointing
his gun directly at the monkey. The monkey's got to think quickly! What is the monkey's best chance to
avoid being smacked by the rubber ball?
a. The monkey should stay right where he is: the bullet will pass beneath him due to gravity.
b. The monkey should let go when the hunter fires. Since the gun is pointing right at him, he can
avoid getting hit by falling to the ground.
C. The monkey should stay right where he is: the bullet will sail above him since its vertical velocity
increases by 9.8 m/s every second of flight.
d. The monkey should let go when the hunter fires. He will fall faster than the bullet due to his
greater mass, and it will fly over his head.
4. You are riding your bike in a straight line with a speed of 10 m/s. You accidentally drop your calculator
out of your backpack from a height of 2.0 m above the ground. When it hits the ground, where is the
calculator in relation to the position of your backpack? Neglect air resistance - note that this might
make your answer non-intuitive!
a. You and your backpack are 6.3 m ahead of the calculator.
5 m/s](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6c07cca6-b565-4f47-b7ee-228f550064a8%2Fe5e72c3d-f577-4344-b090-ce409713dbda%2Fnd7wtfp_processed.jpeg&w=3840&q=75)
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