99 Answered Questions for the topic physics B

14d

Force/Momentum problems

A 0.145 kg baseball is pitched at 35.0 m/s is hit on a horizontal line drive straight back at the pitcher at 50 m/s. If the contact tiem between the bat and ball is 0.02 seconds, thena) what is the... more

14d

Momentum Problems

1) How great of an impulse is needed to change the speed of an 8 kg cart from 32 m/s to 50 m/s? How many seconds would you need to apply a 10 N force in order to cause this impulse? 2) On a serve,... more

14d

Free body diagram question

How would a free body diagram look like during the push-off of ones vertical jump (that is, the jump is vertical). Would it simply be a box with Fg pointing downwards or a box with both Fg and Fn... more

12/15/19

Physics Force Problem (Please help!)

A boulder weighing 2.0x10^4 N is resting on a hillside with a slope of 37 degreesa) what force tends to cause the boulder to slide down the hill?b) If there is no friction on the surface, what is... more

12/14/19

Is it Possible to find the Linear Velocity?

The given information is:~Weight = 495N~Diameter of the Cylinder =10M~Average Acceleration = 21.6M/s2The cylinder is rotating, making the student stick to the wall. Is it possible to find the... more

12/14/19

How do I find the force that the wall is exerting on a student when a cylinder is rotating?

The given information is:~Weight = 495N~Diameter of the Cylinder =10M~Average Acceleration = 21.6M/s2The cylinder is rotating, making the student stick to the wall. How do I find the force that is... more

12/14/19

Select two answers

An amusement park ride called "The Giant Swings" consists of seats suspended by chains from a platform. After the passengers are secured in their seats, the platform rotates and the passengers... more

12/14/19

What is the speed of Satellite B?

Two satellites are in circular orbits around Earth. Satellite A has speed vA. Satellite B has an orbital radius nine times that of satellite A. What is the speed of Satellite B?A. vA.9B. vA/3C.... more

12/09/19

Physics, forces-spring problem

A block that weighs 12N is hanging from a spring scale that you are holding. How could you move the apparatus to produce a scale reading of less than 12NA) move the object downward and stop... more

12/09/19

Physics, work problem

A mover is pushing a 20-kg box up a 30-degree ramp from the ground into a moving truck.The ramp is 2.1m long. He pushes it without rollers where the coefficient of kinetic friction is 0.3.a) what... more

12/08/19

Physics, work problem

A mover is pushing a 20-kg box up a 30-degree ramp from the ground into a moving truck. He pushes with a constant velocity up the 2.1m ramp. He pushes it without rollers where the coefficient of... more

12/08/19

Physics, Energy Problems (confused!)

1) a 2000 kg rollercoaster starts from a height of 55 m and an initrial velocity of 8 m/s. When it reaches the bottom of the hill (height of zero), what is its velocity?2) For the rollercoaster... more

12/04/19

Physics, energy problems

1) a 2000 kg rollercoaster starts from a height of 55 m and an initrial velocity of 8 m/s. When it reaches the bottom of the hill (height of zero), what is its velocity?2) For the rollercoaster... more

11/23/19

dielectric of capacitors

a dielectric with the dielectric constant k=4 is inserted into a parallel plate capacitor, filling 1/3 of the volume. if the capacitance of the capacitor without the dielectric is c whats is the... more

11/11/19

Fnet=ma Problems

1) a 500 kg car is travelling at 15 m/s and experiences a forward engine force of 2000N for 3 seconds. The combined frictional forces acting on the car are 600 N. What is the car's acceleration?2)... more

11/10/19

Fnet=Fma problems

1) a 500 kg car is travelling at 15 m/s and experiences a forward engine force of 2000N for 3 seconds. The combined frictional forces acting on the car are 600 N. What is the car's acceleration?2)... more

10/25/19

Projectile Motion

(Ignore air resistance) A man is riding in the back of a truck (facing forward) that is driving forward at a constant velocity of 30 mph. If he throws a ball straight upward so that it reachers a... more

10/24/19

Projectile Motion

1) A rifle is shot horizontally at a speed of 200m/s above flat ground. Compared to a bullet that is dropped at the same instant, the bullet that is shot will:a) take a longer time to reach the... more

10/20/19

a 9.50kg hanging object.. PHYSICS HELP

A 9.50-kg hanging object is connected by a light, inextensible cord over a light, frictionless pulley to a 5.00-kg block that is sliding on a flat table. Taking the coefficient of kinetic friction... more

10/07/19

PHYSICS - A foreign automobile manufacturer claims that its sports car will accelerate from rest to a speed

A foreign automobile manufacturer claims that its sports car will accelerate from rest to a speed of 45.5 m/s in 7.35 s.(a)Determine the magnitude of the average acceleration of the car (in... more

10/07/19

PHYSICS HELP - A ball is thrown upward from the ground with

A ball is thrown upward from the ground with an initial speed of 23.6 m/s; at the same instant, another ball is dropped from a building 18 m high. After how long will the balls be at the same... more

10/07/19

PHYSICS HELP - A particle moves along the x axis..

A particle moves along the x axis according to the equation x = 2.08 + 3.01t − 1.00t2, where x is in meters and t is in seconds.(a) Find the position of the particle at t = 3.40 s.(b) Find its... more
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