Q- A 40.0 kg crate is suspended between the floor and the ceiling using two spring scales, one attached to the ceiling and one to the floor. If the lower scale reads 117N, what is the reading of the upper scale? Ignore the Weight of the scales.
Solution Search
. August 2016
Electromagnetic Induction
Q- A loop of wire in the shape of a rectangle of width w and length L and a long, straight wire carrying a current I lie on a tabletop as shown in figure. Suppose the current is changing with time according to I = a + b*t, where a and b are constants. Determine the emf that is induced in the loop if…
Newtons Laws of motion: Equilibrium
Q- A 2.0 kg ball tied to a string fixed to the ceiling is pulled to one side by a force F to an angle of 37 degrees from the ceiling.
a) Just before the ball is released and allowed to swing back and forth, how large is the force F that is holding the ball in position.
b) Just before the ball is r…
Friction
Q- A box sits on a horizontal wooden ramp. The coefficient of static friction between the box and the ramp is 0.43. You grab one end of the ramp and lift it up, keeping the other end of the ramp on the ground. What is the angle between the ramp and the horizontal direction when the box begins to sli…
Sliding without Tipping
Q- Determine the horizontal force F necessary to slide the 100 kg crate of height 1.5 m and width 1.00 m. The crate has uniform mass distribution. The coefficient of static friction at the floor is ms = 0.4. What is the maximum height h for which with this force the crate will slide without tipping?
Electrostatics: Potential
Q- Two charges are fixed in place with a separation d. One charge is positive and has seven times (n = 7) the magnitude of the other charge, which is negative. The positive charge lies to the left of the negative charge. Relative to the negative charge, locate the two spots on the line through the c…
Falling Under Air Drag
Q- A skydiver of mass 80.0 kg jumps from a slow-moving aircraft and reaches a terminal speed of 50.0 m/s
- What is the acceleration of the skydiver when her speed is 30.0 m/s2?
- What is the drag force on the skydiver when her speed is 50.0 m/s?
- What is the drag force on the skydiver when her s…
Electromagnetic Induction
Q- An automobile has a vertical radio antenna 1.20 m long. The automobile travels at 72.0 km/h on a horizontal road where the Earth's magnetic field is 50.0 µT directed toward the north and downward at an angle of 60.0° below the horizontal. Calculate the maximum possible magnitude of EMF induced in…
Stable Equilibrium
Q- A uniform rod of mass M and length l can rotate freely in a vertical plane about a smooth hinge at one end. A light inextensible string attached to the other end of the rod passes over a smooth peg which is at a height h (greater than l) vertically above the hinge and supports a mass m hanging fr…
Projectile Motion
Q- An airplane with a speed of 75 m/s is climbing upward at an angle of 37.0 ° with respect to the horizontal. When the plane's altitude is 600 m, the pilot releases a package.
(a) Calculate the distance along the ground, measured from a point directly beneath the point of release, to where the p…
20 .
« Newer | Older »
Comments