# Posts by kwaku

Total # Posts: 9

**physics**

A wheel is roatating freely at an angular speed of 800 rev/min on a Shaft of negligible moment of inertia. A second wheel initially at rest and with twice the moment of inertia of the first, is suddenly coupled to the same shaft. (a) what is the angular speed of the resultant...

**physics**

C) A steel ball bearing the radius 1 cm is rolling along a table with speed 20 cm/sec when it starts to roll up an incline. How high above the table level will it rise before stopping? Ignore friction losses

**physics**

Two objects move on a horizontal frictionless surface along the same line in the same direction which we shall refer to as foward direction. The trailing object of mass 2.0kg has a velocity of 15m/s foward. The leading object of mass 3.2 kg has avelocity of 11m/s foward. The ...

**physics**

A block is pushed 2 m along a fixed horizontal surface by a horizontal force of 10 N. The opposing force of friction is 0.4 N (a)How much work is done by the 10 N force? (b)what is the work done by the friction force

**physics**

A bullet of mass 15 gm is shot horizontally into a 15 kg block of wood attached to a spring of spring constant 1000 N/m. The force of the impact compresses the spring 10 cm. What is the velocity of the bullet?

**physics**

A hockey puck of mass 0.05 kg sliding on the ice with velocity 20m/sec is stopped by a goalie in 0.10 sec. what is the magnitude and direction of the force exerted by the goalie on the puck

**physics**

A 0.2 kg mass hangs at the end of a wire. what is the tension in the wire if the ball is whirled around in a horizontal circle with tangential velocity of 5 m/sec

**physics**

Two objects move on a horizontal frictionless surface along the same line in the same direction which we shall refer to as foward direction. The trailing object of mass 2.0kg has a velocity of 15m/s foward. The leading object of mass 3.2 kg has avelocity of 11m/s foward. The ...

**maths- arithmetic**

The average weight for a group of 20 women is 130 pounds.If the average weight for 3/4 of these women was 140 pounds,what was the average weight,in pounds,for the rest of thee women?