11/04/20

What is the net force (in N) acting on it? (Enter the magnitude.)
The mass of a subway car and passengers is 37,600 kg. If its acceleration as it leaves a station is 0.8 m/s2, what is the net force (in N) acting on it? (Enter the magnitude.)
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11/04/20

disk with string urgent help
A solid uniform disk of mass M = 9.8 kg and radius R = 22 cm rests with its flat surface on a frictionless table (i.e., the axis of the cylinder is perpendicular to the table.) The diagram shows a... more
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11/03/20

A rifle is aimed horizontally and directly at the centre of a target that is 52.0m away.
A rifle is aimed horizontally and directly at the centre of a target that is 52.0m away. a)If the bullet has an initial velocity of 312 ms-1, how long would it take to reach the targetb) how far... more
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11/03/20

A 2.75 kg box is pushed with a 10.5 N force across ground where lk = 0.327. What is the acceleration of the box?
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11/02/20

Circular Motion
A 7 kg mass moves in a circular path of 5 m radius on a frictionless horizontal table. It is attached to a string that passes through a frictionless hole in the center of the table. A second 87 kg... more
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11/02/20

A place kicker must kick a football from a point 30.9 m from a goal
A place kicker must kick a football from a point 30.9 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a... more
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11/02/20

Calculate the potential energy

Calculate the potential energy of a 75 Kg boulder sitting at the edge of a cliff that is 210 meters from the ground (yf=0). b. If the boulder is suddenly pushed over the side of the cliff what is... more
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11/02/20

A 1.75 kg box is pushed with a 8.35 N force across ground where yk = 0.267. What is the net force on the box?
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11/02/20

acceleration perpendicular

if i have an acceleration vector that is perpendicular to the velocity vector how should i draw the parallel acceleration vector?
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11/02/20

help physics plz

1. What is the final speed of Alex C., who starts from rest and accelerates uniformly at 16.0 meters per second^2 over a distance of 8.0 meters?
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11/02/20

A mover pushes a 260 kg piano on wheels up a ramp 7 meters long onto a stage 1.75 meters above the ground. The mover pushes the piano with a force of 680 N and the coefficient of friction is 0.0099.
a) How much work does the mover do (concentrate on just the mover)? b) What work is done on the piano by the ramp? c) What is the speed of the piano at the top of the ramp? d) How much change in KE... more
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11/02/20

1. The driver of an SUV (m = 1700 kg) isn’t paying attention and runs into the back end of a car (m = 950 kg) on level ground at a red light.

On impact, both drivers lock their brakes. The SUV and car stick together and travel a distance of 8.2 m before they come to a stop. How fast was the SUV traveling just before the collision? The... more
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11/02/20

help please sss
An 2 kg wooden block slides across a horizontal wooden floor at constant velocity.What is the magnitude of the force of kinetic friction between the block and the floor?
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11/02/20

physics help please
A bicycle and its rider have a combined mass of 100. kilograms and a speed of 6.0 meters per second. What is the magnitude of the average force needed to bring the bicycle and its rider to a stop... more
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11/02/20

How can I solve this?
A 44.4-kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity... more
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11/02/20

PLS HELP, finding magnitude of acceleration and tension equations

 Two blocks are connected by a string as shown. The inclination of the ramp is θ = 36° while the masses of the blocks are m1 = 3.7 kg and m2 = 16.2 kg. Friction is negligible.(search question above... more
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10/30/20

What is the car's (centripetal) acceleration?
A race car rounds a curve at 53 m/s. The radius of the curve is 405 m, and the car's mass is 670 kg. (Assume the car's speed remains constant. Take the radially inward direction to be... more
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10/30/20

What is the radius of its orbit?
A centripetal force of 170 N acts on a 1,500-kg satellite moving with a speed of 4,700 m/s in a circular orbit around a planet. What is the radius of its orbit?
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10/30/20

What is the equation in slope-intercept form for the line parallel to y=-2x+10 that contains J(6,8)?
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10/30/20

Find its average speed.
A passenger jet flies from one airport to another 1,233 miles away in 2.2 h. Find its average speed.m/s
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10/30/20

equation of the line perpendicular to y=6/5x+ 7 that passes through the point & (−3, 2).

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10/30/20

what are the horizontal and vertical components of its velocity? draw a vector diagram.
 The landing speed of a remote controlled plane is 20m/s. If its landing angle is 10 ° below the horizontal.
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10/30/20

A small bowling ball weighs of 27.4 N. If you kick it sideways with a force of 2 N, then what is its acceleration?

A small bowling ball weighs of 27.4 N. If you kick it sideways with a force of 2 N, then what is its acceleration?
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10/30/20

Kinematics Equation2
An object is moving with an initial velocity of 30 m/s. It is then subject to a constant acceleration of 4.5 m/s^2 for 9 s. How far will it have traveled during the time of its acceleration?
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10/29/20

Which equation represents a line which is perpendicular to the line y=-5/4x-7
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