D: 3200 N
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The diagram shows the levels X and Y in a liquid manometer with the gas tap open. What is the pressure of the gas sup…
A car moves in a circle at constant speed. What is the direction of the resultant force acting on the car?
A uniform beam is balanced at its midpoint. An object is placed on the beam, as shown. Which force will rebalance the…
The centre of the Sun produces large amounts of energy. What is the source of this energy?
A crane lifts a weight of 1000 N through a vertical height of 30 m. It uses 60 000 J of energy. What is the efficienc…
According to the kinetic theory, matter is made up of very small particles in a constant state of motion. Which row b…