Julius competes in the hammer throw event. The hammer has a mass of 7.26 kg and is 1.215 m long.
What is the centripetal force on the hammer when it has a
tangential speed of 31.95 m/s? The answer is rounded off
to the nearest whole number
0 190 N
O 840 N
0 1,400 N
O 6,100 N

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.

Asimple electrochemical cell contains two electrodes? t or f

69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm