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Physics
Franz is standing on a hill throwing a snowball at a target, as illustrated in the diagram below. The centre of the target is located 2.0 m below his hand.Franz tosses the snowball with a velocity of 4.2 m/s at an angle of 50° above the horizontal. The snowball hits the centre of the target, much to Franz’s delight.What is the horizontal distance between Franz and the target?
Physics
While snowboarding, Jonah falls down and his cell phone slides out of his pocket.The cell phone has a mass of 129 g. When it leaves Jonah’s pocket, the cell phone slides on the ice with an initial velocity of 7.2 m/s downhill, sliding directly toward a chairlift pole 22 m away. The icy (negligible friction) hill is sloped at a consistent angle of 19°. What is the cell phone’s speed when it hits the pole? (Neglect frictional forces)
Physics
A ferryboat, whose speed in still water is 3.20m/s, must cross a 340m wide river and arrive at a point 130m upstream from where it starts. To do so, the pilot must point the boat upstream mat an angle of 47 ̊. What is the speed of the river’s current?
Physics
What couple must be applied to a 1 m long wire with 1-mm diameter in order to twist one end of it through 90°, the other end remaining fixed? The rigidity modulus is 2.8 x 10¹⁰ N/m^2
Physics
A car starting from rest with uniform acceleration reaches a velocity of 10 m/s in 10 s and travels with this velocity for 20 s. It then decelerates steadily and comes to a rest 50 s after starting.
A) Plot a velocity time graph for the car's journey. [6 marks]
B) State the car's maximum speed in km/h. [2 marks]
C) Find (by any method),
i) the car's instantaneous velocity at t = 40s [2 marks]
ii) the acceleration during the first 10s of the journey [2 marks]
iii) the distance travelled at constant velocity [2 marks]
iv) the deceleration during the final leg [2 marks]
v) the total distance travelled [2 marks]
vi) the average velocity for the entire journey
A) Plot a velocity time graph for the car's journey. [6 marks]
B) State the car's maximum speed in km/h. [2 marks]
C) Find (by any method),
i) the car's instantaneous velocity at t = 40s [2 marks]
ii) the acceleration during the first 10s of the journey [2 marks]
iii) the distance travelled at constant velocity [2 marks]
iv) the deceleration during the final leg [2 marks]
v) the total distance travelled [2 marks]
vi) the average velocity for the entire journey
Physics
1. To move a large crate across a rough floor, you push on it with a force F at an angle of 21° below the horizontal, as shown in Figure 6–18. Find the force necessary to start the crate moving, given that the mass of the crate is 32 kg and the coefficient of static friction between the crate and the floor is 0.57.
A). Find the acceleration of the crate if the applied force is 330 N and the coefficient of kinetic friction is 0.45.
A). Find the acceleration of the crate if the applied force is 330 N and the coefficient of kinetic friction is 0.45.
Physics
Strings join two object, whose masses are 5 kg and 10 kg. The 5kg object is pulled upward with a force of 120N. Find the tension on the string between the objects.
Physics
How much would a 190 kg man weigh near the photosphere of the Sun, where the acceleration due to gravity is 274 m/s2?
Physics
A heavy object is dropped from a vertical height of 8.0 m. What is it’s speed when it hits the ground?
Physics
Two object whose masses are 5 kg and 10 kg are suspended by strings, as shown in the figure. Find the tension on each string.
