7.A ball is thrown straight up from waist height. After travelling up for a short distance...
7.A ball is thrown straight up from waist height. After travelling up for a short distance it reverses direction and then comes back down and hits the ground. At which of the following times was its velocity zero?
A. When the ball leaves the hand B. At its highest point
C. When it returns to the height from which it was originally thrown D. Just before it hits the ground
Homework Answers
the ball is thrown from waist height, so there must be a velocity in vertical upward direction.
In vertical direction the acceleration is downward which is equal to g = 9.8 m/s2 .
as acceleration is in opposite direction of velocity , Velocity reduces and at highest point it will be zero.
as acceleration is in downward direction (always) , it starts moving back and now we know that velocity and acceleration are in same same direction so velocity increases till it reaches the ground.
Add Answer to:
7.A ball is thrown straight up from
waist height. After travelling up for a short distance...
P5 An iron sphere is thrown straight up from a height of 2 m with a...
P5 An iron sphere is thrown straight up from a height of 2 m with a velocity of 0.3 m/s. It falls back to ground and bounces. After the bounce, it momentarily comes to a stop at a height of 1.9 m, where it is caught. (a) What is the speed of the ball when it first reaches the ground? b) What is its speed when it just leaves the ground after the bounce? (c) Neglecting the time of the...
the mass of the ball is 1kg. Problem 2: A ball is thrown from the top...
the mass of the ball is 1kg.
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity vi = 80 at an angle of 0 = 25° a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact b) 17 points) Find the magnitude and direction of the velocity at the moment of impact. c) 12 points) If the ball does not...
Problem 2: A ball is thrown from the top of a 50m building, with an initial...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity v; = 80 - at an angle of 0 = 25°. a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact b) [7 points) Find the magnitude and direction of the velocity at the moment of impact. c) [2 points] If the ball does not bounce back, what is the energy...
Problem 2: A ball is thrown from the top of a 50m building, with an initial...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity m Vi = 80 at an angle of 0 = 25°. a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact. b) [7 points] Find the magnitude and direction of the velocity at the moment of impact. c) [2 points] If the ball does not bounce back, what is the energy...
Problem 2: A ball is thrown from the top of a 50m building, with an initial...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity m Vi = 80 at an angle of 0 = 25º. a) [4 points) Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact. b) [7 points) Find the magnitude and direction of the velocity at the moment of impact. c) [2 points) If the ball does not bounce back, what is the energy...
Problem 2: A ball is thrown from the top of a 50m building, with an initial...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity vi = 80 m s at an angle of θ = 25°. a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact. b) [7 points] Find the magnitude and direction of the velocity at the moment of impact. c) [2 points] If the ball does not bounce back, what is the...
Problem 2: A ball is thrown from the top of a 50m building, with an initial...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity v = 80 at an angle of 8 - 25 a) (4 points) Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact b) 17 points) Find the magnitude and direction of the velocity at the moment of impact. c) (2 points) If the ball does not bounce back, what is the energy dissipated...
5. You throw a ball straight up from the ground level to a height of 10...
5. You throw a ball straight up from the ground level to a height of 10 ft. The ball falls down and hits the floor. It then bounces back to a height that is 8 ft and repeatedly bouncing up and down indefinitely, each time reaching a height four-fifths of the previous height. (a) When the ball hits the ground the first time, we call this the first hit. Find the height of the ball on the fifth hit. (b)...
2. (a) A ball is fired from a cannon straight up at a velocity of 30ms^...
2. (a) A ball is fired from a cannon straight up at a velocity of 30ms^ - 1. The ball leaves the cannon at a height of 5 m that is vertically above the ground. Find the time taken until the ball hits the ground. Find the velocity of the ball when it hits the ground. If the ball had been projected at 10 ms^ - 1 instead of 30 ms^ - 1, what would its final velocity when it...
a ball is thrown straight up with enough speed so that it is in the air...
a ball is thrown straight up with enough speed so that it is in the air for several seconds assume the positive direction is upwards what is the velocity of a ball when it reaches its highest point
P5 An iron sphere is thrown straight up from a height of 2 m with a velocity of 0.3 m/s. It falls back to ground and bounces. After the bounce, it momentarily comes to a stop at a height of 1.9 m, where it is caught. (a) What is the speed of the ball when it first reaches the ground? b) What is its speed when it just leaves the ground after the bounce? (c) Neglecting the time of the...
the mass of the ball is 1kg.
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity vi = 80 at an angle of 0 = 25° a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact b) 17 points) Find the magnitude and direction of the velocity at the moment of impact. c) 12 points) If the ball does not...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity v; = 80 - at an angle of 0 = 25°. a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact b) [7 points) Find the magnitude and direction of the velocity at the moment of impact. c) [2 points] If the ball does not bounce back, what is the energy...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity m Vi = 80 at an angle of 0 = 25°. a) [4 points] Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact. b) [7 points] Find the magnitude and direction of the velocity at the moment of impact. c) [2 points] If the ball does not bounce back, what is the energy...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity m Vi = 80 at an angle of 0 = 25º. a) [4 points) Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact. b) [7 points) Find the magnitude and direction of the velocity at the moment of impact. c) [2 points) If the ball does not bounce back, what is the energy...
Problem 2: A ball is thrown from the top of a 50m building, with an initial velocity v = 80 at an angle of 8 - 25 a) (4 points) Find the time taken to reach the ground and the range (horizontal distance) to the point of the impact b) 17 points) Find the magnitude and direction of the velocity at the moment of impact. c) (2 points) If the ball does not bounce back, what is the energy dissipated...
5. You throw a ball straight up from the ground level to a height of 10 ft. The ball falls down and hits the floor. It then bounces back to a height that is 8 ft and repeatedly bouncing up and down indefinitely, each time reaching a height four-fifths of the previous height. (a) When the ball hits the ground the first time, we call this the first hit. Find the height of the ball on the fifth hit. (b)...
2. (a) A ball is fired from a cannon straight up at a velocity of 30ms^ - 1. The ball leaves the cannon at a height of 5 m that is vertically above the ground. Find the time taken until the ball hits the ground. Find the velocity of the ball when it hits the ground. If the ball had been projected at 10 ms^ - 1 instead of 30 ms^ - 1, what would its final velocity when it...
Most questions answered within 3 hours.
-
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 40 minutes ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 1 hour ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 2 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 3 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 3 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 4 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 6 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 6 hours ago -
implement a program that reads a number of rows and a symbol.
The program will draw...
asked 6 hours ago -
Assume that when adults with smartphones are randomly selected,
45% use them in meetings or classes....
asked 6 hours ago -
Determine the number of formula units of
Na2SO4 and moles of oxygen contained in 8.11
moles...
asked 6 hours ago -
Explain in steps on the following code
What would be the output when executed
using System;...
asked 6 hours ago