Al is twirling a ball horizontally around his head. The ball moves in a circle because...

Al is twirling a ball horizontally around his head. The ball moves in a circle because
1. there is a force on the ball pulling it outward.
2. tension in the string continuously pulls the ball
  
  inward.
3. once the ball starts moving, circular motion is its
  
  natural tendency.
4. the ball’s force is perpendicular to its acceleration.

Expert Solution

Al is twirling a ball horizontally around his head. The ball moves in a circle because there is a tension in the string continuously pulls the ball

inward. It is so because whenever a person twirls a ball horizontally , there develops a centripetal force in the string (in the form of tension)

which balances the centrifugal force and hence a circular motion is possible. if at any point the string breaks that is the centripetal force becomes 0 , then the ball flies off in the tangent direction (which the direction of instantaneous velocity at that point). also, the centripetal acceleration always point towards the center of circular motion whose magnitude is given by V^2/R , where V is the velocity of ball in uniform motion and R is the radius of the circular motion.

Please ask your doubts or queries in the comment section below.

Please kindly upvote if you are satisfied with the solution.

Thank you.

genius_generous answered 2 years ago

Give a high-level description of a TM (how it moves its head around, etc.) that takes...

Give a high-level description of a TM (how it moves its head around, etc.) that takes a string of the form x#y where x, y ∈ {a, b}* are guaranteed to have |x| = |y| ≥ 1, and swaps x and y (i.e., it should halt with y#x written on the tape). For example, if the input is abb#bab then the output should be bab#abb. Do not give a state diagram. Use the “marking” idea to keep track of where...

1. A student pulls horizontally on a 12 kg box, which then moves horizontally with an...

1. A student pulls horizontally on a 12 kg box, which then moves horizontally with an acceleration of 0.2 m/s2. If the student uses a force of 15 N, what is the coefficient of kinetic friction of the floor? 2. A 30 kg block slides down a 20° ramp with an acceleration of 1.2 m/s2. What is the coefficient of kinetic friction between the block and the ramp? 3. For a given velocity of projection in a projectile motion, the...

A ball of mass and velocity collides head-on with a ball of mass that is initially at...

A ball of mass and velocity collides head-on with a ball of mass that is initially at rest. No external forces act on the balls. Show what is conserved through the appropriate formula if the collision is elastic. b. What are the velocities of the balls after the collision?

A comet moves in an elliptical orbit around the sun. As the comet moves from aphelion...

A comet moves in an elliptical orbit around the sun. As the comet moves from aphelion (the point on the orbit farthest from the sun) to perihelion (the point on the orbit closest to the sun), which of the following results is true? Speed of the comet Angular momentum of the comet/sun system Gravitational potential energy of the comet/sun system A Increases Increases Decreases B Increases Constant Decreases C Decreases Decreases Increases D Increases Increases Constant E Constant Constant Constant

A 43.0 g ball is fired horizontally with initial speed v0toward a 107 g ball that...

A 43.0 g ball is fired horizontally with initial speed v0toward a 107 g ball that is hanging motionless from a 1.2 m -long string. The balls undergo a head-on, perfectly elastic collision, after which the 107 g ball swings out to a maximum angle θmax = 50.0 ∘. What was v0?

A ball is kicked horizontally with 15 m/s initial speed from a cliff. The ball lands...

A ball is kicked horizontally with 15 m/s initial speed from a cliff. The ball lands 75 m away from the base of the cliff (R = 75m). What is the height of the cliff? What is the hitting velocity (the velocity of the ball before it hits the ground)? What is the total time of flight?

A 16 g ball is fired horizontally with speed v0 toward a 111 g ball hanging...

A 16 g ball is fired horizontally with speed v0 toward a 111 g ball hanging motionless from a 0.9-m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 111 g ball swings out to a maximum angle θmax=53°. What was v0?

A 27 g ball is fired horizontally with speed v0 toward a 106 g ball hanging...

A 27 g ball is fired horizontally with speed v0 toward a 106 g ball hanging motionless from a 1.13-m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 106 g ball swings out to a maximum angle θmax=57°. What was v0?

7. A cue ball traveling horizontally at 2.5 m/s strikes a stationary 8-ball, causing the 8-ball...

7. A cue ball traveling horizontally at 2.5 m/s strikes a stationary 8-ball, causing the 8-ball to travel at a 30◦ angle with respect to the horizontal. If the two have the same mass, (a) What are the speeds of the cue and 8-ball post-collision? (b) Using your results, indicate what kind of collision occurred. You must back up your conclusion using your results.

A ball is thrown horizontally off the edge of a cliff with an initial speed of...

A ball is thrown horizontally off the edge of a cliff with an initial speed of 20 m/s . how long does it take for the ball to fall to the ground 86.3 m below? .How long would it take for the ball to reach the ground 86.3 m below if it were dropped from rest off the cliff edge ? . how long would it take the ball to fall to the ground 86.3 m below if it were...

Question