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Physics - Force and Motion

1. A 10-kg body is observed to have an acceleration of 5 m/s². What is the net force acting on it? 2. A force of 80N gives an object of unknown mass an acceleration of 20 m/s². What is its mass?

Physics - Force and Motion.

(a) What is the weight of an object whose mass is 5kg? (b) What is its acceleration when a net force of 100 N acts on it?

Physics - Translational Motion

A block slides down from rest from the top of an inclined plane 30° above the horizontal. The plane is 100ft long and frictionless. What distance will it travel on a frictionless horizontal surface at the first of the plane 6.00s after it has traveled from rest? Acceleration in the inclined plane is a = g = 32ft/s² Plea

Motion on a straight line: Average acceleration

Please see the file attached. The brakes of a car where initial velocity is 30 m/s are applied and the car received an acceleration of -2.00m/s2 a. How far will it have gone when its velocity has decreased to 15m/s b. When it has come to a stop ?

A set of 19 problems on dynamics.

I need help with the following problems and all the circled ones in the attached file, numbers 22, 23, 14, 7, 8. 22. A moving object is acted on by a net force. Give an example of a situation in which the object moves (a) in the same direction as the net force; (b) at right angles to the net force; (c) in the opposite di

Motion in 2D: Maximum range of projectile down the incline

1) a) Find the angle required to maximize the range down an incline which is pitched at an angle of −θ with respect to the horizontal and the projectile is shot an angle of φ above the incline at a speed of v0 . b) Determine the distance down the incline at the angle found in a). c) Plot the trajectory gi

Does the acceleration of the blocks increase, decrease or stay the same?

I need help with the attached problems, circled only, numbers 3 and 4. Could you please provide the answers and workings out to them. Please see attachment. 3. In example 6 - 6 (connected blocks), suppose m1 and m2 are both increased by a factor 2. (a) Does the acceleration of the blocks increase, decrease, or stay the same

Acceleration of a Block on Frictionless Surface

A block is given an initial push force up a smooth frictionless incline of 15 degrees that propels it up at 2m/s. -What is the acceleration of the block? -What is the distance the block travels up the plane? -What is the time the block takes to return back down to the starting point?

Motion of particle suspended by string, in horizontal plane

(Please see the attached file) A particle is attached to one end of a light inextensible string. The other end of the string is attached to a fixed point O. The particle is set into motion, so that it describes a horizontal circle whose centre is vertically below O. The angle between the string and the vertical is theta, as s

Tension immediately after one string breaks

Please see the attached file. The slender uniform bar ABC has a mass of 12 kg and is anchored to the support ceiling by two cables T1 and T2. Given that T2 breaks; find the tension in T1 immediately after the break. Solve using the equations of motion for the x and y directions. Take the moments about the Center Of Mass (point

Minimum Wave Amplitude

A large ant is standing on the middle of a circus tightrope that is stretched with tension T_s. The rope has mass per unit length mu. Wanting to shake the ant off the rope, a tightrope walker moves her foot up and down near the end of the tightrope, generating a sinusoidal transverse wave of wavelength lambda and amplitude A. As

Newton's laws of motion problem

A large cube of 25 kg is being accelerated across a frictionless horizontal surface by a horizontal force P. A small cube (4 kg) is in contact with the front surface of the large cube and will slide downwards unless P is sufficiently large. The coefficient of static friction between the cubes is 0.71. a) Draw separate freeb

Force and acceleration

Please see attachment. 11. What is the weight of a 2.50-kg bag of sand on the surface of the earth? 12. A 2.00-kg projectile is fired at an angle of 20.0 degrees. What is the magnitude of the force exerted on the projectile when it is at the highest position of its trajectory? 13. A 44-kg child steps onto a scale and the s

circular motion explanation

Please see attachment. Thank You your help is greatly needed. 1. A ball moves with a constant speed of 4 m/s around a circle of radius 0.25 m. What is the period of the motion? 2. A racecar is traveling at constant speed around a circular track. What happens to the centripetal acceleration of the car if the speed is doubled

Pennies on a meter scale

You and a friend place pennies every 10 cm along a meter stick. You hold one end as a pivot and release the other end from a horizontal position. You note that the pennies near the pivot stay on the meter stick while the pennies near the released end are left behind. a) At the instant that the (pivoted) meter stick is releas

the acceleration of the ladder extension on the firetruck

The firetruck us moving forward at a speed of 35 MPH and is decelerating at a rate of 10ft/sec.^2. Simultaneously, the ladder is being raised and extended. At the instant considered the angle Ø is 30° and is increasing at a rate of 10 degrees/sec . Also at this instant the extension b of the ladder is 5 ft and Vb = 2 feet /

Angular Acceleration Rotational Dynamics

Please see the attached file. 5/139. The sliding collar moves up and down the shaft, causing an oscillation of crank OB. If the velocity of A is not changing as it passes the null position where AB is horizontal and OB is vertical, determine the angular acceleration of OB in that position.

Force: Motion on an incline with friction.

Problem: The incline is 30 degrees with a kinetic friction coefficient of 0.20. Initially the system is not moving. It is given a push uphill at 1m/s and there is a total distance of 1.5m from initial point to the end of the incline. a. Minimum coefficient of friction to keep the system from moving initially b. Whe

Calculating Projectile in Motion: Example Problems

A projectile of mass 20.2 kg is fired at an angle of 65.0 degrees above the horizontal and with a speed of 84.0 m/s. At the highest point of its trajectory the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial speed. You can ignore air resistance. a) How far from the point

Relative Motion and Energy

See Attachments Please include all FBD and explanations. 1. The launch catapult of an aircraft carrier gives the 7Mg jet airplane gives the airplane a constant acceleration and launches the airplane in a distance of 100 m measured along the angled takeoff ramp. The carrier is moving at a constant speed of 16 m/s. If an ab

Newton's laws of motion with acceleration

(Please see the attachment for fig.) Determine the acceleration of bodies A and B and the tension in the (non stretching) cable due to the application of the 60 lb force. Neglect all frictional forces and the masses of the pulleys. (mass will be in slugs) Find 1. Acceleration of A 2. Acceleration of B

Acceleration of Bodies on Pulleys

Determine the acceleration of bodies A and B and the tension in the (non stretching) cable due to the application of the 60 lb force. Neglect all frictional forces and the masses of the pulleys (mass will be in slugs).

Pulleys and Constrained Motion

In the pulley system shown (see attachment) the two upper pulleys are welded together to form one unit the cable is wrapped around the smaller pulley with the end secured to the pully (no slip) . Determine the upward acceleration of B if A has a downward acceleration 0f 2 ft/sec.