Please HELP and explain these two questions 1. A ball is rolled across a floor so...
Please HELP and explain these two questions
1. A ball is rolled across a floor so that it collides with a wall and bounces off, back toward the person who had started to roll the ball, at the same speed it had been traveling before it hit the wall. Does the velocity of the ball change during this process? Explain.
2. A car that just starting up from a red light has zero velocity at the instant it starts. Must the acceleration of the car also be zero at this instant? Explain.
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Please HELP and explain these two questions
1. A ball is rolled across a floor so...
answer all please 1 If a 71-kg astronaut at rest in space throws a ball with...
answer all please
1 If a 71-kg astronaut at rest in space throws a ball with mass 0.61 kg at a speed of 12 mph. What happens to the astronaut as a result? 4 A moving ball collides elastically with another ball that is twice as heavy and is initially at rest. What happens to the lighter ball as a result of the collision? (a) She picks up some of the movement of the ball, causing her to move forward....
is ball on Moon, where the acceleration due to gravity is 1/6(g -9.8) and air resistance...
is ball on Moon, where the acceleration due to gravity is 1/6(g -9.8) and air resistance is negligible, is hit directly upward and returns to the same level 85 s later, (a) How high above its origjinal point did the ball go? (b) How fast it moving just a after it was hit? 7. Two train cars are on a straight, horizontal track. The car A starts at rest and is put in motion with a constant acceleration of 2.00...
Please answer the following physic questions. Thank you! 1. A dog sees a flowerpot sail up...
Please answer the following physic questions. Thank you! 1. A dog sees a flowerpot sail up and then back past a window 5.0 ft high. If the total time the pot is in sight is 1.0 seconds, find the height above the window that the pot rises. 2. An elevator ascends with an upward acceleration of 4.0 ft/s2. At the instant its upward speed is 8.0 ft/s, a loose bolt drops from the ceiling of the elevator 9.0 ft from...
PROBLEMS and QUESTIONS 1. An object moves across the floor and comes to a stop. Explain...
PROBLEMS and QUESTIONS 1. An object moves across the floor and comes to a stop. Explain how Aristotle and Galileo would view this motion differently. 2. Explain the difference between speed and velocity and give examples of each. 3. Explain how an object can have a constant speed and a varying velocity. 4. What are the units of acceleration? 5. If an automobile travels at the rate of 40 miles per hour, how long will it take to travel 400...
i need help with these questions about physics. Elastic Collision Question 8 A 2 kg ball...
i need help with these questions about physics.
Elastic Collision Question 8 A 2 kg ball initially at rest rolls down a 30-degree inclined plane from a height of 4 meters (assume kinetic and rolling friction are negligible). A 2 kg box initially at rest slides down a 30-degree directionless inclined plane from a height of 4 meters. How do the velocities of the ball and the box compare when they both reach the bottom of their respective inclined planes?...
Motion diagrams and video point questions Answer all questions: PHY111/21VPre Laboratory Problems: Motion Diagrams and VideoPoint...
Motion diagrams and video point questions
Answer all questions:
PHY111/21VPre Laboratory Problems: Motion Diagrams and VideoPoint 1. Which graph best describes the "horizontal distance traveled" (vertical axis) versus elapsed" (horizontal axis) for a car traveling at a constant speed of 60 miles down the letter and then justify your answer in a complete sentence the our? Write per h Horizontal Position of Car (in miles) Answer 240 -T- 180- Justify: C,イ 日apsed Time 0 1 2 3 4 2. (a)...
you are given 4 vectors with equal magnitudes. under what conditions will their sum be zero?...
you are given 4 vectors with equal magnitudes. under what conditions will their sum be zero? if a vector has an equal, positive x and y components, what are the angles it makes with the axes? A superhero jumped horizontally from a 31 m high rooftop to the ground immediately after he spotted a child walking towards a busy street all alone. Fortunately, he lands on the street just next to the child in 2.5s and the child is rescued!...
1. A billiard trick shot artist shoots a cue ball at 4 m/s off a horizontal...
1. A billiard trick shot artist shoots a cue ball at 4 m/s off a horizontal table at the edge of the Empire State Building. Neglecting air resistance, at the instant before the ball lands in a cup on the ground, what is the horizontal (x component ) of the ball’s velocity? a. 0 m/s b. 4 m/s c. 8 m/s d. 19.6 m/s 2. Mary swims a lap in the 25 m pool, does a kick turn off the...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
Hi I need help with the following problems: 1.A ball is thrown horizontally from the roof...
Hi I need help with the following problems: 1.A ball is thrown horizontally from the roof of a building 45.0 m tall and lands 24.0 m from the base. What was the ball’s initial speed? 2.A football is kicked at ground level with a speed of at an angle of 36.9º to the horizontal. How much later does it hit the ground? How height does it rise? What is its range? 3.A projectile is fired with an initial speed of...
answer all please
1 If a 71-kg astronaut at rest in space throws a ball with mass 0.61 kg at a speed of 12 mph. What happens to the astronaut as a result? 4 A moving ball collides elastically with another ball that is twice as heavy and is initially at rest. What happens to the lighter ball as a result of the collision? (a) She picks up some of the movement of the ball, causing her to move forward....
is ball on Moon, where the acceleration due to gravity is 1/6(g -9.8) and air resistance is negligible, is hit directly upward and returns to the same level 85 s later, (a) How high above its origjinal point did the ball go? (b) How fast it moving just a after it was hit? 7. Two train cars are on a straight, horizontal track. The car A starts at rest and is put in motion with a constant acceleration of 2.00...
PROBLEMS and QUESTIONS 1. An object moves across the floor and comes to a stop. Explain how Aristotle and Galileo would view this motion differently. 2. Explain the difference between speed and velocity and give examples of each. 3. Explain how an object can have a constant speed and a varying velocity. 4. What are the units of acceleration? 5. If an automobile travels at the rate of 40 miles per hour, how long will it take to travel 400...
i need help with these questions about physics.
Elastic Collision Question 8 A 2 kg ball initially at rest rolls down a 30-degree inclined plane from a height of 4 meters (assume kinetic and rolling friction are negligible). A 2 kg box initially at rest slides down a 30-degree directionless inclined plane from a height of 4 meters. How do the velocities of the ball and the box compare when they both reach the bottom of their respective inclined planes?...
Motion diagrams and video point questions
Answer all questions:
PHY111/21VPre Laboratory Problems: Motion Diagrams and VideoPoint 1. Which graph best describes the "horizontal distance traveled" (vertical axis) versus elapsed" (horizontal axis) for a car traveling at a constant speed of 60 miles down the letter and then justify your answer in a complete sentence the our? Write per h Horizontal Position of Car (in miles) Answer 240 -T- 180- Justify: C,イ 日apsed Time 0 1 2 3 4 2. (a)...
1. A car accelerates from zero to 105 km/h in 5.21 s. What is its average acceleration in km/h/s and m/s? 2. An object moving in the x-direction has a position described by the function x(t) - 6.30t + 8.70t2, where t is in seconds and x is in meters. What is the acceleration as a function of time? The figure shows the graph of v vs t for the motion of a motorcyle that starts from rest and moves...
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