After some time of fleeing, Bob realizes it is almost his curfew time and that his mom will ground him if he is not back at home (Bob’s mom can be scarier than the police). Bob turns around...

After some time of fleeing, Bob realizes it is almost his curfew time and that his mom will ground him if he is not back at home (Bob’s mom can be scarier than the police). Bob turns around...

A Student moves a box of books with a rope by pulling the rope with a force of 90 N at an angle of 30°. The books have a mass of 20 kg and a coefficient of friction between the box...

An astronaut has a mass of 80 kg, but on an unknown planet, the bathroom scale reads 15 kg when the astronaut stands on it. What is the astronaut's weight and the gravitational field strength on the...

A block of mass 7.33 kg lies on a frictionless horizontal surface. The block is connected by a cord passing over a pulley to another block of mass 2.45 kg which hangs in the air, as shown...

A skier of mass 87.8 kg comes down a slope of constant angle 44◦ with the horizontal. What is the force on the skier parallel to the slope? The acceleration of gravity is 9.8 m/s 2...

A table lamp has a circular base of diameter 120 mm and a height of 300 mm. It stands on a rough horizontal surface. The Centre of mass of the table lamp is 60 mm above its table. Why the table lamp...

A machine component of mass 14kg is constrained to move only in the direction of the slide as shown. It is subject to the force F= 350N as shown. Neglecting effects of static weight, calculate its...

A 25 kg wooden crate is being pushed against a large spring with a spring constant of 1200 N/m. If the coefficient of friction between the crate and the ground is 0.68, how much does the spring...

After a 1.30 x 10^2kg astronaut (incl. equipment) connects a safety line (length = 22.0m) to herself and to the spacecraft (mass = 2.80 x 10^3kg), she pushes against the craft and moves away at a...

The force of gravity between two small masses A and B when placed very near each other is 3.24x10^-7 N. What will the force between these objects be if both of their masses are doubled and the distance...

A 1 kg model rocket is launched at a 30 degree angle from the floor. The small rocket burns for 5.00 s and has a steady thrust of 20.0 N. What maximum altitude does the rocket reach and range of the...

I've been stuck on this question forever and I keep getting it wrong :( Please help! A truck of mass 3 tonnes is travelling at 105km/h when it hits a car of mass 1.5 tonne travelling...

A car (m=900kg) travelling at 70km/h hits a pedestrian (m=60kg) who is travelling at 1m/s in the same direction. After the collision the car has a velocity of 30km/h in the same direction it was originally...

A 650kg car travelling 5m/s1 NORTH EAST turns so that it is travelling 4m/s1 NORTH in 2 seconds. Calculate the magnitude of the force required to make such a turn.

A 1t car initially travelling at 60kmh^-1 experiences a force of 1000N from the engine, and a frictional force of 130N in the opposite direction. A) Calculate the net force on the car. B)...

A net force acts on mass m1 and creates an acceleration.A mass m2 is added to mass m1.The same net force acting on two mass together creates one-third the acceleration.Determine the ratio m2/m1

https://s11.postimg.org/9f0lz9z1f/equilibrium.jpg

https://postimg.org/image/m5vobypg3/

a.) What is the smallest force parallel to the incline needed to keep the sofa from sliding down? b.) What parallel force is required to keep the sofa moving up the incline at a constant...

When I calculating resultant force in equilateral triangle why there is square root vector formula we will put?

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