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...

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

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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?

You are a roller coaster engineer, and safety inspectors tell you that your roller coaster has too much centripetal force. What can you do to decrease the centripetal foce acting on your roller...

For each situation, determine whether the forces acting on a roller coaster are balanced or unbalanced and explain why using physics terms please: The roller coaster moves at...

Gabriella (75 kg) rides a roller coaster. What is her acceleration at the top of the vertical loop if she feels like her weight is 1200N? What is Gabriella's...

To slide a metal puck across a greased sheet of metal at constant speed requires a force of 0.525 N. If the force of gravity on the puck is 5.00 N, what is the coefficient of friction between the...

A car is travelling at 120 km/hr when it slams on the brakes. a. How long is the skid mark if the coefficient of friction is 0.62? (hint: convert km/hr to m/s) b. Explain why a more massive...

A girl twirls a key chain in a circle if she twirls it faster, she finds that she holds the chain tighter. Explain why this is necessary. I think it's that she has to hold the...

The space shuttle has a mass of 2.0 x 106 kg. At lift-off, the engines generate an upward force of 3.0 x 107 N. a. What is the acceleration of the shuttle? b. If the shuttle is in outer space...

The maximum force that the handles on a grocery bag can withstand and not rip is 250 N. a. If 20 kg of groceries are lifted from the floor to the table with an acceleration of 5 m/s2, will the...

A tow-truck is trying to pull a 1.4 x 103 kg car out of some mud. The coefficient of static friction is 0.76. What force will the tow truck have to apply to the car before it will start to move?...