Physics

1) A 2.5 kg ball strikes a wall with a velocity of 8.5 m/s to the left. The ball bounces off with avelocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25 s, what is theconstant force exerted on the ball by the wall?
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Objects that are able to roll have what type of energy?A. potentialB. mechanicalC. thermalD. chemical
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. Rohit had only one light source in his room. He was told by his friend that he can make the room more lighted by using mirror. What type of mirror can be used for the purpose?
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How are clouds related to water vapor and water droplets?A.Water vapor in the air condenses to form tiny water droplets, and these water droplets make up clouds.B.Water vapor in the air makes up clouds, but water vapor does not condense to form tiny water droplets that make up clouds.C.Water vapor in the air condenses to form tiny water droplets, but the water vapor and water droplets do not make up clouds.D.Water vapor in the air stays in the air as water vapor. The water vapor does not make up clouds, and it does not condense to form tiny water droplets.
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14. Saeed is pulling a 6 kg heavy rock with an upward force of 40 N but does not succeed to lift it up. What is the magnitude of the normal force on the rock?
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A body vibrates 100 times in 20 seconds. Find its frequency and time period.plz answer this its urgent
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what is the name for a force of gravity acting on an object
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What is the unique geological feature found on Mercury surface?
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the driver of the bus brought the students to the playground and returned to the garage on the same road when the bus engine was doing more work: A when the students were driving: B when they returned to the garage, explain why
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A box of mass 5.0 kg is initially at rest. A 500 N force causes it to move horizontally through adistance of 12.00 m. How much work would there be?
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PLEASE HELP WITH THIS ONE QUESTIONA bird lands on a bird feeder which is connected to a spring. The mass of the bird is exactly the same as the mass of the bird feeder. How does the added mass affect the period of oscillation of the bird feeder?The period is less, but not halved.The period is more, but not doubled.The period is halved.The period is doubled.
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I want answer plzz??
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Why sound waves are called mechanical waves
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Think of one obstacle that you know YOU CAN, YOU WILL, & YOU MUST overcome.
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In order to increase the final momentum of a golf ball, we coulda) follow through when hitting the ballb) increase the force acting on itc) increase the time of contact with the balld) swing as hard as possiblef) All of the above
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A 55 kg boy is riding a skateboard at a speed of 1.0 m/s. What is hiskinetic energy?
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In a transverse wave, the distance from any two consecutive crest or any two consecutive troughs is called the
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A mass sitting on a horizontal, frictional surface is attached to one end of a spring; the other end is fixed to a wall. 3.0 J ofwork is required to compress the spring by 0.20 m. If the mass is released from rest with the spring compressed, itcompresses a maximum acceleration of 15 m/s?.a) Determine the spring constant.b) Determine the mass.d) What is the velocity when the mass reaches maximum acceleration?c) Deterinine the net force when the mass passes 0.10m compressiond) Determine the acceleration when the mass passes 0.10m compression.e) Determine the velocity when the mass passes 0.10m compression
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While sitting in a boat, a fisherman observes that 2 complete waves pass by his position every 4 seconds. What is the period of these waves?A)2s B)8s C) 0.5 s D) 4s
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A washing machine spin dries clothes. It starts spinning at 20 rad/s and slows down to 8 rad/s while turning through 500 revolutions.a. What is the angular acceleration?b. How much time does it take to slow down?
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How is it difficult to perform electrostatic experiments on humid days
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HELP PLEASE44. Two wave pulses are traveling along a stringtoward each other as represented in the diagrambelow.(D is interference)
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is a rare disorder that includes the inability to feel pain.A. Somatoform pain disorderB. Congenital analgesiaC. KinesthesisD. AnesthesiaPlease select the best answer from the choices provided B.D
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pulling a 15 kg mass from a bucket from a depth of 6 meters well a man shook 20 sec what was his power
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