Pertanyaan
1. Layangan bermassa 0,05 kg tertambat di atap rumah Jika atap rumah setinggi 10 m dan gravitas di tempat itu 9,8m/s^2 maka energi potensial yang dimiliki layangan sebesar __ joule. 2. Sepeda bermassa __ kg dikendarai oleh Tini yang bermassa 50 kg Kecepatan sepeda mencapai 8m/s dan energi kinetik Tini dan sepedanya sebesar 2240 joule. 3. Bola kasti bermassa O 15 kg dipukul oleh pemain dengan kecepatan __ m/s sehingga bola kasti itu memiliki energi 120 joule. 4. Basuki yang bermassa 70 kg duduk di batang pohon setinggi __ m dari atas tanah Dengan gravitasi bumi 10m/s^2 di tempat itu, energi potensial gravitasi yang Basuki miliki yaitu 2.100 joule. 5. Seekorburung bermassa 015 kg hinggap di dahan pohon setinggi 4 m. Tiba-tiba pemburu menembak ke arah burung sehingga burung terbang dengan kecepatan 30m/s, maka energi kinetik yang dimiliki burung saat terbang sebesar __ joule.
Solusi
Jawaban
1. 4.9 joules2. 18 kg3. 20 m/s4. 30 m5. 67,5 joule
Penjelasan
1 Let's begin with the first part. The formula for gravitational potential energy is MGH, where M stands for mass, G for gravity, and H for height. Considering a kite (Layangan) tethered to a rooftop (Atap) with a mass (M) of 0.05 kg, atop the household at a height of (H) 10 meters, and a gravitational acceleration (G) to be of 9.8 m/s2. Then you'd substitute these values in and find out gravitational potential energy the kite holds.2 Next we deal with encoding of kinetic energy Tini Get from riding a bike. It comes from the kinetic energy formula: 0.5mV^2, where mass (m) and velocity (V) are taken into account.3 Player hits a baseball having a mass of 0.15 kg, we determine its speed when it possesses 120 joules of energy. Is it a certain numeric riddle? we no doubt ponder the same formula: 0.5mV^2.4 Basuki sits on a tree branch which is above the earth at a certain height. From whereabouts does gravitational potential energy generate? It should come from our renowned equation of physics ((basal situation): height (H) * mass (M) * Gravity(G)) will make it work.5 For a bird of mass 0.15 kg resting on a tree branch at a height of 4 metres suddenly threatened under a hunter’s shoot, it winged out clinging the existence with a velocity of 30 m/s. Appropriately, its kinetic energy is reckoned by that established rule 0.5*m*V^2 relating mass of the the bird and its speed.