Which of the following statements are true of projectiles? Name all that apply.?
I would go with the following: A: False - Free fall suggests being dropped not projected. B: False - Throw a box, there's plenty of resistance. We tend to design projectiles with low drag though. C: False - Can move in any direction they're projected. D: False - Only if it is initially projected in a downwards direction, otherwise the initial acceleration is in another direction. E: True - It can be projected straight up or down. F: True - If it is being projected straight downwards. G: True - Throw something upwards and see.
Which of the following statements about projectile motion is not true?
A) e acceleration of gravity on earth is approximately 32 feet per second per second B)An object shot or thrown vertically into the air reaches a maximum height after t seconds (when time is measured in seconds), where t is the h-coordinate of the vertex of the parabola C) An object thrown or shot vertically into the air reaches a maximum height after t seconds (when time is measured in seconds), where t is the k-coordinate of the vertex of the parabola D) The acceleration of gravity on earth is approximately 9.8 meters per second per second
Which of the following statements about projectile motion is true?
The vertical velocity component determines the range of a projectile. The horizontal velocity component determines the hang time of a projectile. The range of a projectile increases with an increase in the angle of launch. The hang time of a projectile is greatest for a vertical launch.
Which of the following statements is not true for an object in projectile motion?
i might flow with right here: A: fake - loose fall exhibits being dropped no longer projected. B: fake - Throw a container, there is an excellent number of resistance. we tend to layout projectiles with low drag however. C: fake - Can flow in any direction they are projected. D: fake - on condition that this is initially projected in a downwards direction, in any different case the preliminary acceleration is in yet another direction. E: genuine - this is projected in the present day up or down. F: genuine - whether this is being projected in the present day downwards. G: genuine - toss something upwards and spot.
Which of the following statements are true about an object in two-dimensional projectile motion with no air resistance?
A) would be true because gravity acts downward and once the projectile is fired the horizontal force on it goes to zero. B. is not true because gravity is always downward. C. is not true because gravity always acts. D is only true if the projectile is fired vertically----otherwise the object always has a horizontal velocity. E neither the speed nor the velocity (the vector of speed) is constant. Gravity is always changing the speed throughout the projectiles flight.
Which of the following are true for an object in projectile motion!?
A is true, and B is conditionally true. A. In y(t) = h + Uyt - 1/2 gt^2; g is typically taken to be 9.81 m/s^2. TRUE. B. In the above, assuming no air resistance, the only force comes from W = mg, the force of gravity. TRUE when no air is assumed, but FALSE when air resistance is added in. C. A can be written as y(X) = h + tan(theta) X - 1/2 g X^2/Ux^2, which shows X as the independent variable and Y as the dependent. X = Ux t. FALSE. D. The time to reach ground is the solution to the quadratic, 1/2 gt^2 - Uyt - h - y(t) = 0 which clearly shows the initial vertical speed Uy as part of the solution. FALSE.
Which of the following statements are true about the motion of an object?
The first one is correct. It is simply vector form of Newton's second law. The second one is incorrect. You said that the force should be in right, if the force is in right, the the body will turn towards right. The third one is incorrect. The net force on the object is zero due to equality of centripetal (force towards centre) force and centrifugal force (force outwards). That is why the body remains in the same circular path of same radius. The fourth one is correct. As Newton's law states that linear momentum is directly proportional to the force applied. The quantity "Momentum" and "Force" are in vector form. The vector laws when applied on both of them gives this statement.
Which of the following are true for projectile motion?
Well, when an object can be called a projectile, that means that it is in Free Fall(only gravity is effecting it). So, B. is right. Also, since only gravity is affecting it, then air resistance cannot be. So, C. is also right. D. cannot be right because that would be assuming that the object is not accelerating up or downwards, and we all know that gravity makes something accelerate, wether positively or negatively. As for A., I beleive that it is correct, too.
Which of the following is true for projectile motion?
B, C and D are true for projectile motion. A is not true, because all projectiles have 3 dimensions, so their motion always occurs in 3 dimensions. However, it is usually assumed that projectile motion occurs in 2 dimensions, and in one dimension - in the event of a straight-up and straight-down motion.
A2A What is meant by one-dimensional projectile motion?I thought projectile motion is always 2 dimensional as the definition from google supports my claim. As always, please explain in simple terms as I’ve been promoted to 11th grade.“Projectile motion is a form of motion in which an object or particle (called a projectile) is thrown near the earth's surface, and it moves along a curved path under the action of gravity only.”Curved path implies 2-D, right?That might be a good question to ask your 11th grade teacher. I have no idea who would use such a term.Projectiles in the real world are 3D and follow 3D paths… such as an arrow or a cannonball, or a bullet (or my golf ball, as I have a wicked slice). Gravity is not the only force acting on a projectile. There are 3 components to the direction and 3 components to the value, too (and they may not all be uniform throughout the entire trajectory of the golf ball).If you only wish to study the motions individually, then you don’t have to consider the single-dimensional equivalent, you only have to ignore one or more other dimensions in calculating the motion.You could use a projection to accomplish this feat. Or a light bulb. Simply track the projectile’s shadow across a flat surface. Move the light source for different effects.Projectile Motion | Tutor 4 PhysicsVector ProjectionsProjectile MotionYou will use this physics one day… (video starts at 2:45)FIXING A HUGE GOLF SLICEOf course, there is always another way to skin a cat…Polara Ultimate Straight XS Self Correcting 3 Piece Golf Balls (1-Dozen)