As well as stone, projectile points were also made of worked wood, bone, antler, horn, or ivory; all of these are less common in the Americas. In regions where metallurgy emerged, projectile points were eventually made from copper, bronze, or iron, though the change was by no means immediate.
What motion is a stone thrown at a distance?
motion of an object moving in a curved path is called
curvilinear motion
. Example: A stone thrown into the air at an angle. Curvilinear motion describes the motion of a moving particle that conforms to a known or fixed curve.
What is the motion of a stone?
a). The stone is moving in a “
CIRCULAR MOTION”
.
What is the motion of a stone thrown from a catapult?
When a stone is thrown from a catapult it is not circulatory motion. It is
projectile motion
. For circulatory motion the object must move in complete circle but in this case complete circle is not formed by the projected stone. Hence it is projectile motion.
What happens when a stone reaches its highest point when thrown up?
The
velocity is zero
because the stone is at stationary at the highest point in its trajectory.
What is the acceleration of a projectile at the top of its trajectory?
The vertical acceleration of a projectile is
0 m/s/s
when it is at the peak of its trajectory. As a projectile rises towards the peak of its trajectory, the vertical acceleration will decrease; as it falls from the peak of its trajectory, its vertical acceleration will decrease.
What is the least speed the ball will have during its flight?
The least speed of an object during a projectile occurs at the topmost point in its trajectory where it’ll only have
a horizontal component of velocity
. However for the time flight to be half of its maximum values, the launch angle will have to be 30∘ since sin30∘=12 .
What is the 4 types of motion?
In the world of mechanics, there are four basic types of motion. These four are
rotary, oscillating, linear and reciprocating
. Each one moves in a slightly different way and each type of achieved using different mechanical means that help us understand linear motion and motion control.
What are the 7 types of motion?
Rotatory motion,
rotatory motion, oscillatory motion, uniform circular and periodic motion, rectilinear motion
, oscillatory motion and periodic motion.
Are we rest or motion?
With respect to a person sitting, standing, lying inside the train, the answer to main question is: the
man is at rest
. While with respect to a person standing, sitting, lying outside the train, the answer to main question is: the man is moving. All motion is relative.
What materials are good for a homemade catapult?
- Eight craft sticks (popsicle sticks)
- Four or five sturdy rubber bands.
- Glue.
- Plastic bottle cap to hold a cotton ball.
- Cotton ball (If you do not have any available, you can make a small ball by crumbling some paper.)
- Small open area (One square meter will do.
What type of motion is used in a catapult?
Background. A catapult is a launching device that allows us to experimentally observe
projectile motion
(see Figure 1). Once the ball is launched, the only forces acting are gravity and air resistance. Gravity accelerates the ball in the negative y direction.
How do you make a small catapult at home?
- Stack five craft sticks together and wrap a rubber band around each end.
- Stack two craft sticks and wrap a rubber band around only one end.
- Slide the five sticks in-between the two sticks, as shown.
- Wrap a rubber band where the two sections meet to hold the catapult together.
What is the acceleration of the stone at the highest point?
In fact, the acceleration at the top has the same magnitude of
9.80 m/s
2
and the same downward direction as during the rest of the motion.
At what point during its motion is the object’s acceleration zero?
At a
projectile’s highest point
, its velocity is zero. At a projectile’s highest point, its acceleration is zero.
What is the velocity of the ball when it reaches its highest point?
At its maximum height, the speed of the ball is: Answer:
0 m/s
. The instantaneous speed of any projectile at its maximum height is zero.
