Recent content by Jack_Straw

Homework Statement A car of weight 1490 N operating at a rate of 121 kW develops a maximum speed of 49 m/s on a level, horizontal road. Assuming that the resistive force (due to friction and air resistance) remains constant, what is the car’s maximum speed on an incline of 1 in 20; i.e...

I found my mistake. The ramp is stated as 8.5m not 8.4. Sorry!

Homework Statement To move a refrigerator of mass 210 kg into a house, a mover puts it on a dolly and covers the steps leading into the house with a wooden plank acting as a ramp. The plank is 8.5 m long and rises 2.4 m. The mover pulls the dolly with constant velocity and with a steady force...

Homework Statement (a) A ball of mass 0.4 kg, initially at rest, is kicked directly toward a fence from a point 20 m away, as shown below. The velocity of the ball as it leaves the kicker’s foot is 17 m/s at angle of 42◦ above the horizontal. The top of the fence is 5 m high. The ball hits...